./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/pthread/bigshot_s.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version da043454 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/pthread/bigshot_s.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4d8c741fd238f074816319de9a9bd5d97cd9b35eb7f53a276be973ea0c31ecbe --- Real Ultimate output --- This is Ultimate 0.3.0-wip.fs.system-includes-da04345-m [2025-04-30 10:46:06,700 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-30 10:46:06,752 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-04-30 10:46:06,755 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-30 10:46:06,755 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-30 10:46:06,778 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-30 10:46:06,778 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-30 10:46:06,779 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-30 10:46:06,779 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-04-30 10:46:06,779 INFO L153 SettingsManager]: * Use memory slicer=true [2025-04-30 10:46:06,779 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-30 10:46:06,779 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-30 10:46:06,779 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-30 10:46:06,779 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-30 10:46:06,779 INFO L153 SettingsManager]: * Use SBE=true [2025-04-30 10:46:06,779 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-30 10:46:06,779 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-30 10:46:06,782 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-30 10:46:06,782 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-30 10:46:06,782 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-30 10:46:06,782 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-04-30 10:46:06,783 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-04-30 10:46:06,783 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-04-30 10:46:06,783 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-30 10:46:06,783 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-04-30 10:46:06,783 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-04-30 10:46:06,783 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-30 10:46:06,783 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-30 10:46:06,783 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-30 10:46:06,783 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-30 10:46:06,783 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-30 10:46:06,783 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-30 10:46:06,784 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-30 10:46:06,784 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-30 10:46:06,784 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-30 10:46:06,784 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-30 10:46:06,784 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-30 10:46:06,784 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-30 10:46:06,784 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-30 10:46:06,785 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-30 10:46:06,785 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-30 10:46:06,785 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-30 10:46:06,785 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-30 10:46:06,785 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-04-30 10:46:06,785 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-04-30 10:46:06,785 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-30 10:46:06,785 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d8c741fd238f074816319de9a9bd5d97cd9b35eb7f53a276be973ea0c31ecbe [2025-04-30 10:46:07,079 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-30 10:46:07,086 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-30 10:46:07,088 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-30 10:46:07,089 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-30 10:46:07,090 INFO L274 PluginConnector]: CDTParser initialized [2025-04-30 10:46:07,091 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/bigshot_s.i [2025-04-30 10:46:08,318 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a334fd36/d86f4e8f40ee417794fb3754945c4084/FLAGe22b8ac2f [2025-04-30 10:46:08,561 INFO L389 CDTParser]: Found 1 translation units. [2025-04-30 10:46:08,561 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/bigshot_s.i [2025-04-30 10:46:08,580 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a334fd36/d86f4e8f40ee417794fb3754945c4084/FLAGe22b8ac2f [2025-04-30 10:46:09,518 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a334fd36/d86f4e8f40ee417794fb3754945c4084 [2025-04-30 10:46:09,520 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-30 10:46:09,521 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-04-30 10:46:09,522 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-30 10:46:09,522 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-30 10:46:09,529 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-30 10:46:09,529 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.04 10:46:09" (1/1) ... [2025-04-30 10:46:09,530 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ea0c5c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:46:09, skipping insertion in model container [2025-04-30 10:46:09,530 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.04 10:46:09" (1/1) ... [2025-04-30 10:46:09,560 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-30 10:46:09,924 INFO L211 PostProcessor]: Analyzing one entry point: main [2025-04-30 10:46:09,931 INFO L200 MainTranslator]: Completed pre-run [2025-04-30 10:46:09,984 INFO L211 PostProcessor]: Analyzing one entry point: main [2025-04-30 10:46:10,052 INFO L204 MainTranslator]: Completed translation [2025-04-30 10:46:10,053 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:46:10 WrapperNode [2025-04-30 10:46:10,053 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-30 10:46:10,054 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-30 10:46:10,054 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-30 10:46:10,054 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-30 10:46:10,058 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:46:10" (1/1) ... [2025-04-30 10:46:10,072 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:46:10" (1/1) ... [2025-04-30 10:46:10,089 INFO L138 Inliner]: procedures = 322, calls = 24, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 67 [2025-04-30 10:46:10,091 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-30 10:46:10,091 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-30 10:46:10,093 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-30 10:46:10,093 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-30 10:46:10,099 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:46:10" (1/1) ... [2025-04-30 10:46:10,099 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:46:10" (1/1) ... [2025-04-30 10:46:10,102 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:46:10" (1/1) ... [2025-04-30 10:46:10,116 INFO L175 MemorySlicer]: Split 13 memory accesses to 3 slices as follows [2, 9, 2]. 69 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0]. The 1 writes are split as follows [0, 0, 1]. [2025-04-30 10:46:10,116 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:46:10" (1/1) ... [2025-04-30 10:46:10,116 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:46:10" (1/1) ... [2025-04-30 10:46:10,121 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:46:10" (1/1) ... [2025-04-30 10:46:10,122 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:46:10" (1/1) ... [2025-04-30 10:46:10,127 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:46:10" (1/1) ... [2025-04-30 10:46:10,128 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:46:10" (1/1) ... [2025-04-30 10:46:10,128 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:46:10" (1/1) ... [2025-04-30 10:46:10,134 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-30 10:46:10,136 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-04-30 10:46:10,136 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-04-30 10:46:10,136 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-04-30 10:46:10,137 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:46:10" (1/1) ... [2025-04-30 10:46:10,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-30 10:46:10,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-30 10:46:10,162 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-04-30 10:46:10,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-04-30 10:46:10,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#0 [2025-04-30 10:46:10,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#1 [2025-04-30 10:46:10,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#2 [2025-04-30 10:46:10,183 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-04-30 10:46:10,183 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-04-30 10:46:10,183 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-04-30 10:46:10,183 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-04-30 10:46:10,183 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-04-30 10:46:10,184 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-04-30 10:46:10,184 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-04-30 10:46:10,184 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-04-30 10:46:10,184 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-04-30 10:46:10,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-04-30 10:46:10,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-04-30 10:46:10,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-04-30 10:46:10,184 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-30 10:46:10,184 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-30 10:46:10,186 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-04-30 10:46:10,273 INFO L234 CfgBuilder]: Building ICFG [2025-04-30 10:46:10,275 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-30 10:46:10,408 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-30 10:46:10,409 INFO L283 CfgBuilder]: Performing block encoding [2025-04-30 10:46:10,485 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-30 10:46:10,485 INFO L312 CfgBuilder]: Removed 1 assume(true) statements. [2025-04-30 10:46:10,486 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.04 10:46:10 BoogieIcfgContainer [2025-04-30 10:46:10,486 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-04-30 10:46:10,487 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-30 10:46:10,487 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-30 10:46:10,490 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-30 10:46:10,490 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.04 10:46:09" (1/3) ... [2025-04-30 10:46:10,491 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27aa642f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.04 10:46:10, skipping insertion in model container [2025-04-30 10:46:10,491 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:46:10" (2/3) ... [2025-04-30 10:46:10,491 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27aa642f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.04 10:46:10, skipping insertion in model container [2025-04-30 10:46:10,491 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.04 10:46:10" (3/3) ... [2025-04-30 10:46:10,492 INFO L128 eAbstractionObserver]: Analyzing ICFG bigshot_s.i [2025-04-30 10:46:10,501 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-30 10:46:10,502 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG bigshot_s.i that has 3 procedures, 42 locations, 45 edges, 1 initial locations, 1 loop locations, and 10 error locations. [2025-04-30 10:46:10,503 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-04-30 10:46:10,560 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-04-30 10:46:10,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 48 places, 47 transitions, 108 flow [2025-04-30 10:46:10,607 INFO L116 PetriNetUnfolderBase]: 6/45 cut-off events. [2025-04-30 10:46:10,611 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-30 10:46:10,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54 conditions, 45 events. 6/45 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 72 event pairs, 0 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2025-04-30 10:46:10,614 INFO L82 GeneralOperation]: Start removeDead. Operand has 48 places, 47 transitions, 108 flow [2025-04-30 10:46:10,616 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 44 transitions, 100 flow [2025-04-30 10:46:10,623 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-30 10:46:10,633 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2f2428f6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-30 10:46:10,634 INFO L341 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2025-04-30 10:46:10,638 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-30 10:46:10,638 INFO L116 PetriNetUnfolderBase]: 1/14 cut-off events. [2025-04-30 10:46:10,639 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-30 10:46:10,639 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-30 10:46:10,639 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:46:10,639 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-04-30 10:46:10,643 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:46:10,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1745696950, now seen corresponding path program 1 times [2025-04-30 10:46:10,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-30 10:46:10,648 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613383290] [2025-04-30 10:46:10,648 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-30 10:46:10,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-30 10:46:10,704 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-04-30 10:46:10,727 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-04-30 10:46:10,727 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:46:10,727 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:46:10,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:46:10,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-30 10:46:10,921 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613383290] [2025-04-30 10:46:10,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613383290] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-30 10:46:10,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-30 10:46:10,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-30 10:46:10,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437780260] [2025-04-30 10:46:10,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-30 10:46:10,929 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-30 10:46:10,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-30 10:46:10,948 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-30 10:46:10,948 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-04-30 10:46:11,003 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2025-04-30 10:46:11,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 44 transitions, 100 flow. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:46:11,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-30 10:46:11,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2025-04-30 10:46:11,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-30 10:46:11,078 INFO L116 PetriNetUnfolderBase]: 11/60 cut-off events. [2025-04-30 10:46:11,078 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-30 10:46:11,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 60 events. 11/60 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 143 event pairs, 3 based on Foata normal form. 2/51 useless extension candidates. Maximal degree in co-relation 84. Up to 24 conditions per place. [2025-04-30 10:46:11,079 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 19 selfloop transitions, 3 changer transitions 0/39 dead transitions. [2025-04-30 10:46:11,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 39 transitions, 134 flow [2025-04-30 10:46:11,082 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-30 10:46:11,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-30 10:46:11,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 103 transitions. [2025-04-30 10:46:11,093 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5478723404255319 [2025-04-30 10:46:11,095 INFO L175 Difference]: Start difference. First operand has 45 places, 44 transitions, 100 flow. Second operand 4 states and 103 transitions. [2025-04-30 10:46:11,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 39 transitions, 134 flow [2025-04-30 10:46:11,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 39 transitions, 126 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-04-30 10:46:11,101 INFO L231 Difference]: Finished difference. Result has 41 places, 38 transitions, 86 flow [2025-04-30 10:46:11,103 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=86, PETRI_PLACES=41, PETRI_TRANSITIONS=38} [2025-04-30 10:46:11,106 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, -4 predicate places. [2025-04-30 10:46:11,107 INFO L485 AbstractCegarLoop]: Abstraction has has 41 places, 38 transitions, 86 flow [2025-04-30 10:46:11,107 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:46:11,107 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-30 10:46:11,107 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:46:11,108 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-04-30 10:46:11,108 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-04-30 10:46:11,108 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:46:11,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1717969130, now seen corresponding path program 1 times [2025-04-30 10:46:11,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-30 10:46:11,108 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430882122] [2025-04-30 10:46:11,108 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-30 10:46:11,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-30 10:46:11,119 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-04-30 10:46:11,127 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-04-30 10:46:11,127 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:46:11,127 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:46:11,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:46:11,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-30 10:46:11,255 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430882122] [2025-04-30 10:46:11,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430882122] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-30 10:46:11,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-30 10:46:11,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-30 10:46:11,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350636298] [2025-04-30 10:46:11,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-30 10:46:11,256 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-30 10:46:11,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-30 10:46:11,257 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-30 10:46:11,257 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-04-30 10:46:11,315 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 47 [2025-04-30 10:46:11,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 38 transitions, 86 flow. Second operand has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:46:11,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-30 10:46:11,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 47 [2025-04-30 10:46:11,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-30 10:46:11,432 INFO L116 PetriNetUnfolderBase]: 16/76 cut-off events. [2025-04-30 10:46:11,432 INFO L117 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2025-04-30 10:46:11,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134 conditions, 76 events. 16/76 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 178 event pairs, 7 based on Foata normal form. 2/63 useless extension candidates. Maximal degree in co-relation 53. Up to 40 conditions per place. [2025-04-30 10:46:11,433 INFO L140 encePairwiseOnDemand]: 41/47 looper letters, 22 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2025-04-30 10:46:11,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 148 flow [2025-04-30 10:46:11,434 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-30 10:46:11,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-30 10:46:11,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 108 transitions. [2025-04-30 10:46:11,435 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.574468085106383 [2025-04-30 10:46:11,435 INFO L175 Difference]: Start difference. First operand has 41 places, 38 transitions, 86 flow. Second operand 4 states and 108 transitions. [2025-04-30 10:46:11,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 148 flow [2025-04-30 10:46:11,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 140 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-04-30 10:46:11,437 INFO L231 Difference]: Finished difference. Result has 42 places, 40 transitions, 103 flow [2025-04-30 10:46:11,437 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=103, PETRI_PLACES=42, PETRI_TRANSITIONS=40} [2025-04-30 10:46:11,437 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, -3 predicate places. [2025-04-30 10:46:11,437 INFO L485 AbstractCegarLoop]: Abstraction has has 42 places, 40 transitions, 103 flow [2025-04-30 10:46:11,438 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:46:11,438 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-30 10:46:11,438 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:46:11,438 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-04-30 10:46:11,438 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-04-30 10:46:11,438 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:46:11,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1717435208, now seen corresponding path program 1 times [2025-04-30 10:46:11,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-30 10:46:11,438 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355434510] [2025-04-30 10:46:11,439 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-30 10:46:11,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-30 10:46:11,447 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-04-30 10:46:11,449 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-04-30 10:46:11,450 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:46:11,450 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:46:11,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:46:11,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-30 10:46:11,490 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355434510] [2025-04-30 10:46:11,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355434510] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-30 10:46:11,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-30 10:46:11,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-30 10:46:11,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86298716] [2025-04-30 10:46:11,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-30 10:46:11,491 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-30 10:46:11,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-30 10:46:11,491 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-30 10:46:11,491 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-04-30 10:46:11,513 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 47 [2025-04-30 10:46:11,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 103 flow. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:46:11,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-30 10:46:11,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 47 [2025-04-30 10:46:11,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-30 10:46:11,563 INFO L116 PetriNetUnfolderBase]: 15/77 cut-off events. [2025-04-30 10:46:11,564 INFO L117 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2025-04-30 10:46:11,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 77 events. 15/77 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 176 event pairs, 1 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 49. Up to 20 conditions per place. [2025-04-30 10:46:11,564 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 19 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2025-04-30 10:46:11,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 40 transitions, 149 flow [2025-04-30 10:46:11,565 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-30 10:46:11,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-30 10:46:11,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 107 transitions. [2025-04-30 10:46:11,565 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5691489361702128 [2025-04-30 10:46:11,565 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 103 flow. Second operand 4 states and 107 transitions. [2025-04-30 10:46:11,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 40 transitions, 149 flow [2025-04-30 10:46:11,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 40 transitions, 144 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-04-30 10:46:11,566 INFO L231 Difference]: Finished difference. Result has 41 places, 38 transitions, 102 flow [2025-04-30 10:46:11,567 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=102, PETRI_PLACES=41, PETRI_TRANSITIONS=38} [2025-04-30 10:46:11,567 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, -4 predicate places. [2025-04-30 10:46:11,567 INFO L485 AbstractCegarLoop]: Abstraction has has 41 places, 38 transitions, 102 flow [2025-04-30 10:46:11,567 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:46:11,567 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-30 10:46:11,567 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:46:11,567 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-04-30 10:46:11,567 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-04-30 10:46:11,570 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:46:11,570 INFO L85 PathProgramCache]: Analyzing trace with hash -850989204, now seen corresponding path program 1 times [2025-04-30 10:46:11,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-30 10:46:11,570 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159193947] [2025-04-30 10:46:11,570 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-30 10:46:11,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-30 10:46:11,576 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-04-30 10:46:11,581 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-04-30 10:46:11,581 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:46:11,581 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:46:11,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:46:11,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-30 10:46:11,666 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159193947] [2025-04-30 10:46:11,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159193947] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-30 10:46:11,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-30 10:46:11,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-30 10:46:11,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967069502] [2025-04-30 10:46:11,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-30 10:46:11,667 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-30 10:46:11,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-30 10:46:11,668 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-30 10:46:11,668 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-04-30 10:46:11,694 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 47 [2025-04-30 10:46:11,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 38 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:46:11,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-30 10:46:11,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 47 [2025-04-30 10:46:11,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-30 10:46:11,749 INFO L116 PetriNetUnfolderBase]: 14/66 cut-off events. [2025-04-30 10:46:11,749 INFO L117 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2025-04-30 10:46:11,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 66 events. 14/66 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 135 event pairs, 4 based on Foata normal form. 2/62 useless extension candidates. Maximal degree in co-relation 49. Up to 31 conditions per place. [2025-04-30 10:46:11,750 INFO L140 encePairwiseOnDemand]: 41/47 looper letters, 20 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2025-04-30 10:46:11,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 40 transitions, 154 flow [2025-04-30 10:46:11,750 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-30 10:46:11,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-30 10:46:11,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 114 transitions. [2025-04-30 10:46:11,751 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.6063829787234043 [2025-04-30 10:46:11,751 INFO L175 Difference]: Start difference. First operand has 41 places, 38 transitions, 102 flow. Second operand 4 states and 114 transitions. [2025-04-30 10:46:11,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 40 transitions, 154 flow [2025-04-30 10:46:11,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 40 transitions, 146 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-04-30 10:46:11,752 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 105 flow [2025-04-30 10:46:11,752 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=105, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2025-04-30 10:46:11,753 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, -4 predicate places. [2025-04-30 10:46:11,753 INFO L485 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 105 flow [2025-04-30 10:46:11,753 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:46:11,753 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-30 10:46:11,753 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:46:11,753 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-04-30 10:46:11,753 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-04-30 10:46:11,754 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:46:11,754 INFO L85 PathProgramCache]: Analyzing trace with hash -391476111, now seen corresponding path program 1 times [2025-04-30 10:46:11,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-30 10:46:11,754 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552583438] [2025-04-30 10:46:11,754 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-30 10:46:11,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-30 10:46:11,761 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-04-30 10:46:11,769 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-04-30 10:46:11,770 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:46:11,770 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:46:11,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:46:11,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-30 10:46:11,902 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552583438] [2025-04-30 10:46:11,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552583438] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-30 10:46:11,902 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525875407] [2025-04-30 10:46:11,902 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-30 10:46:11,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:46:11,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-30 10:46:11,905 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-30 10:46:11,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-04-30 10:46:11,946 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-04-30 10:46:11,960 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-04-30 10:46:11,960 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:46:11,960 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:46:11,962 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-04-30 10:46:11,970 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-30 10:46:12,030 INFO L325 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-04-30 10:46:12,031 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2025-04-30 10:46:12,051 INFO L325 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-04-30 10:46:12,051 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-04-30 10:46:12,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:46:12,180 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-30 10:46:12,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:46:12,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525875407] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-30 10:46:12,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-30 10:46:12,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2025-04-30 10:46:12,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081141127] [2025-04-30 10:46:12,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-30 10:46:12,316 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-04-30 10:46:12,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-30 10:46:12,316 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-04-30 10:46:12,316 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2025-04-30 10:46:12,541 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 47 [2025-04-30 10:46:12,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 105 flow. Second operand has 14 states, 14 states have (on average 21.0) internal successors, (294), 14 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:46:12,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-30 10:46:12,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 47 [2025-04-30 10:46:12,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-30 10:46:12,727 INFO L116 PetriNetUnfolderBase]: 33/126 cut-off events. [2025-04-30 10:46:12,728 INFO L117 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2025-04-30 10:46:12,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259 conditions, 126 events. 33/126 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 222 event pairs, 6 based on Foata normal form. 12/135 useless extension candidates. Maximal degree in co-relation 95. Up to 38 conditions per place. [2025-04-30 10:46:12,729 INFO L140 encePairwiseOnDemand]: 40/47 looper letters, 32 selfloop transitions, 11 changer transitions 0/55 dead transitions. [2025-04-30 10:46:12,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 55 transitions, 233 flow [2025-04-30 10:46:12,729 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-04-30 10:46:12,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-04-30 10:46:12,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2025-04-30 10:46:12,730 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5319148936170213 [2025-04-30 10:46:12,730 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 105 flow. Second operand 7 states and 175 transitions. [2025-04-30 10:46:12,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 55 transitions, 233 flow [2025-04-30 10:46:12,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 55 transitions, 225 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-04-30 10:46:12,731 INFO L231 Difference]: Finished difference. Result has 47 places, 41 transitions, 159 flow [2025-04-30 10:46:12,731 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=159, PETRI_PLACES=47, PETRI_TRANSITIONS=41} [2025-04-30 10:46:12,732 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, 2 predicate places. [2025-04-30 10:46:12,732 INFO L485 AbstractCegarLoop]: Abstraction has has 47 places, 41 transitions, 159 flow [2025-04-30 10:46:12,732 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 21.0) internal successors, (294), 14 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:46:12,732 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-30 10:46:12,732 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:46:12,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-04-30 10:46:12,933 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:46:12,933 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-04-30 10:46:12,933 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:46:12,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1646348453, now seen corresponding path program 1 times [2025-04-30 10:46:12,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-30 10:46:12,934 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850912412] [2025-04-30 10:46:12,934 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-30 10:46:12,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-30 10:46:12,939 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-04-30 10:46:12,940 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-04-30 10:46:12,940 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:46:12,941 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:46:12,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:46:12,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-30 10:46:12,957 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850912412] [2025-04-30 10:46:12,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850912412] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-30 10:46:12,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-30 10:46:12,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-30 10:46:12,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001322792] [2025-04-30 10:46:12,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-30 10:46:12,957 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-30 10:46:12,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-30 10:46:12,958 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-30 10:46:12,958 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-30 10:46:12,963 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 47 [2025-04-30 10:46:12,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 41 transitions, 159 flow. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:46:12,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-30 10:46:12,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 47 [2025-04-30 10:46:12,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-30 10:46:12,993 INFO L116 PetriNetUnfolderBase]: 21/109 cut-off events. [2025-04-30 10:46:12,994 INFO L117 PetriNetUnfolderBase]: For 101/101 co-relation queries the response was YES. [2025-04-30 10:46:12,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254 conditions, 109 events. 21/109 cut-off events. For 101/101 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 205 event pairs, 11 based on Foata normal form. 1/106 useless extension candidates. Maximal degree in co-relation 171. Up to 51 conditions per place. [2025-04-30 10:46:12,994 INFO L140 encePairwiseOnDemand]: 45/47 looper letters, 24 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2025-04-30 10:46:12,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 41 transitions, 209 flow [2025-04-30 10:46:12,995 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-30 10:46:12,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-30 10:46:12,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 89 transitions. [2025-04-30 10:46:12,995 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.6312056737588653 [2025-04-30 10:46:12,995 INFO L175 Difference]: Start difference. First operand has 47 places, 41 transitions, 159 flow. Second operand 3 states and 89 transitions. [2025-04-30 10:46:12,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 41 transitions, 209 flow [2025-04-30 10:46:12,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 41 transitions, 193 flow, removed 6 selfloop flow, removed 2 redundant places. [2025-04-30 10:46:12,997 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 143 flow [2025-04-30 10:46:12,997 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=143, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2025-04-30 10:46:12,998 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, 2 predicate places. [2025-04-30 10:46:12,998 INFO L485 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 143 flow [2025-04-30 10:46:12,998 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:46:12,998 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-30 10:46:12,998 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:46:12,998 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-04-30 10:46:12,998 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-04-30 10:46:12,998 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:46:12,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1748588019, now seen corresponding path program 1 times [2025-04-30 10:46:12,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-30 10:46:13,000 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649507201] [2025-04-30 10:46:13,000 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-30 10:46:13,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-30 10:46:13,007 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-04-30 10:46:13,011 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-04-30 10:46:13,011 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:46:13,011 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:46:13,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:46:13,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-30 10:46:13,116 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649507201] [2025-04-30 10:46:13,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649507201] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-30 10:46:13,116 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238485049] [2025-04-30 10:46:13,116 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-30 10:46:13,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:46:13,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-30 10:46:13,118 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-30 10:46:13,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-04-30 10:46:13,159 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-04-30 10:46:13,175 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-04-30 10:46:13,175 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:46:13,175 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:46:13,176 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-04-30 10:46:13,178 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-30 10:46:13,186 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-04-30 10:46:13,286 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:46:13,287 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-30 10:46:13,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:46:13,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238485049] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-30 10:46:13,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-30 10:46:13,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2025-04-30 10:46:13,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513388233] [2025-04-30 10:46:13,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-30 10:46:13,385 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-04-30 10:46:13,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-30 10:46:13,385 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-04-30 10:46:13,387 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2025-04-30 10:46:13,501 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 47 [2025-04-30 10:46:13,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 143 flow. Second operand has 11 states, 11 states have (on average 23.727272727272727) internal successors, (261), 11 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:46:13,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-30 10:46:13,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 47 [2025-04-30 10:46:13,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-30 10:46:13,636 INFO L116 PetriNetUnfolderBase]: 26/115 cut-off events. [2025-04-30 10:46:13,636 INFO L117 PetriNetUnfolderBase]: For 60/60 co-relation queries the response was YES. [2025-04-30 10:46:13,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 256 conditions, 115 events. 26/115 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 191 event pairs, 4 based on Foata normal form. 6/117 useless extension candidates. Maximal degree in co-relation 231. Up to 30 conditions per place. [2025-04-30 10:46:13,637 INFO L140 encePairwiseOnDemand]: 41/47 looper letters, 27 selfloop transitions, 11 changer transitions 0/52 dead transitions. [2025-04-30 10:46:13,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 52 transitions, 243 flow [2025-04-30 10:46:13,638 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-04-30 10:46:13,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-04-30 10:46:13,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2025-04-30 10:46:13,640 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2025-04-30 10:46:13,640 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 143 flow. Second operand 7 states and 188 transitions. [2025-04-30 10:46:13,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 52 transitions, 243 flow [2025-04-30 10:46:13,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 52 transitions, 242 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-04-30 10:46:13,643 INFO L231 Difference]: Finished difference. Result has 56 places, 41 transitions, 192 flow [2025-04-30 10:46:13,644 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=192, PETRI_PLACES=56, PETRI_TRANSITIONS=41} [2025-04-30 10:46:13,644 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, 11 predicate places. [2025-04-30 10:46:13,644 INFO L485 AbstractCegarLoop]: Abstraction has has 56 places, 41 transitions, 192 flow [2025-04-30 10:46:13,646 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 23.727272727272727) internal successors, (261), 11 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:46:13,646 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-30 10:46:13,646 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:46:13,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-04-30 10:46:13,850 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2025-04-30 10:46:13,850 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-04-30 10:46:13,850 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:46:13,850 INFO L85 PathProgramCache]: Analyzing trace with hash 177837018, now seen corresponding path program 1 times [2025-04-30 10:46:13,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-30 10:46:13,851 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493089718] [2025-04-30 10:46:13,851 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-30 10:46:13,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-30 10:46:13,857 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-04-30 10:46:13,861 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-04-30 10:46:13,861 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:46:13,861 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:46:13,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:46:13,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-30 10:46:13,900 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493089718] [2025-04-30 10:46:13,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493089718] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-30 10:46:13,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-30 10:46:13,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-04-30 10:46:13,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236389264] [2025-04-30 10:46:13,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-30 10:46:13,900 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-30 10:46:13,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-30 10:46:13,901 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-30 10:46:13,901 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-04-30 10:46:13,910 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 47 [2025-04-30 10:46:13,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 41 transitions, 192 flow. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:46:13,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-30 10:46:13,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 47 [2025-04-30 10:46:13,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-30 10:46:13,954 INFO L116 PetriNetUnfolderBase]: 20/108 cut-off events. [2025-04-30 10:46:13,955 INFO L117 PetriNetUnfolderBase]: For 184/184 co-relation queries the response was YES. [2025-04-30 10:46:13,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 294 conditions, 108 events. 20/108 cut-off events. For 184/184 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 184 event pairs, 11 based on Foata normal form. 0/105 useless extension candidates. Maximal degree in co-relation 263. Up to 51 conditions per place. [2025-04-30 10:46:13,957 INFO L140 encePairwiseOnDemand]: 43/47 looper letters, 24 selfloop transitions, 3 changer transitions 0/41 dead transitions. [2025-04-30 10:46:13,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 41 transitions, 246 flow [2025-04-30 10:46:13,958 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-30 10:46:13,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-30 10:46:13,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2025-04-30 10:46:13,958 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5425531914893617 [2025-04-30 10:46:13,958 INFO L175 Difference]: Start difference. First operand has 56 places, 41 transitions, 192 flow. Second operand 4 states and 102 transitions. [2025-04-30 10:46:13,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 41 transitions, 246 flow [2025-04-30 10:46:13,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 41 transitions, 232 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-04-30 10:46:13,960 INFO L231 Difference]: Finished difference. Result has 54 places, 40 transitions, 182 flow [2025-04-30 10:46:13,960 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=182, PETRI_PLACES=54, PETRI_TRANSITIONS=40} [2025-04-30 10:46:13,961 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, 9 predicate places. [2025-04-30 10:46:13,961 INFO L485 AbstractCegarLoop]: Abstraction has has 54 places, 40 transitions, 182 flow [2025-04-30 10:46:13,961 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:46:13,961 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-30 10:46:13,961 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:46:13,961 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-04-30 10:46:13,961 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-04-30 10:46:13,961 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:46:13,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1253845180, now seen corresponding path program 1 times [2025-04-30 10:46:13,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-30 10:46:13,963 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574237519] [2025-04-30 10:46:13,963 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-30 10:46:13,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-30 10:46:13,969 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-04-30 10:46:13,975 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-04-30 10:46:13,975 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:46:13,975 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:46:14,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:46:14,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-30 10:46:14,144 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574237519] [2025-04-30 10:46:14,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574237519] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-30 10:46:14,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-30 10:46:14,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-04-30 10:46:14,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087663833] [2025-04-30 10:46:14,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-30 10:46:14,146 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-04-30 10:46:14,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-30 10:46:14,146 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-04-30 10:46:14,146 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2025-04-30 10:46:14,218 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 47 [2025-04-30 10:46:14,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 40 transitions, 182 flow. Second operand has 9 states, 9 states have (on average 20.22222222222222) internal successors, (182), 9 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:46:14,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-30 10:46:14,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 47 [2025-04-30 10:46:14,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-30 10:46:14,386 INFO L116 PetriNetUnfolderBase]: 24/129 cut-off events. [2025-04-30 10:46:14,387 INFO L117 PetriNetUnfolderBase]: For 103/103 co-relation queries the response was YES. [2025-04-30 10:46:14,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 336 conditions, 129 events. 24/129 cut-off events. For 103/103 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 263 event pairs, 12 based on Foata normal form. 0/127 useless extension candidates. Maximal degree in co-relation 303. Up to 53 conditions per place. [2025-04-30 10:46:14,387 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 31 selfloop transitions, 12 changer transitions 0/55 dead transitions. [2025-04-30 10:46:14,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 55 transitions, 303 flow [2025-04-30 10:46:14,388 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-04-30 10:46:14,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-04-30 10:46:14,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 256 transitions. [2025-04-30 10:46:14,388 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.45390070921985815 [2025-04-30 10:46:14,388 INFO L175 Difference]: Start difference. First operand has 54 places, 40 transitions, 182 flow. Second operand 12 states and 256 transitions. [2025-04-30 10:46:14,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 55 transitions, 303 flow [2025-04-30 10:46:14,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 55 transitions, 293 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-04-30 10:46:14,390 INFO L231 Difference]: Finished difference. Result has 67 places, 47 transitions, 240 flow [2025-04-30 10:46:14,390 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=240, PETRI_PLACES=67, PETRI_TRANSITIONS=47} [2025-04-30 10:46:14,391 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, 22 predicate places. [2025-04-30 10:46:14,391 INFO L485 AbstractCegarLoop]: Abstraction has has 67 places, 47 transitions, 240 flow [2025-04-30 10:46:14,391 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.22222222222222) internal successors, (182), 9 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:46:14,391 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-30 10:46:14,391 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:46:14,391 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-04-30 10:46:14,391 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-04-30 10:46:14,392 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:46:14,392 INFO L85 PathProgramCache]: Analyzing trace with hash 391753353, now seen corresponding path program 1 times [2025-04-30 10:46:14,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-30 10:46:14,392 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468745695] [2025-04-30 10:46:14,392 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-30 10:46:14,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-30 10:46:14,397 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-04-30 10:46:14,401 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-04-30 10:46:14,401 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:46:14,401 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:46:14,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:46:14,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-30 10:46:14,588 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468745695] [2025-04-30 10:46:14,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468745695] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-30 10:46:14,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-30 10:46:14,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-04-30 10:46:14,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444453186] [2025-04-30 10:46:14,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-30 10:46:14,588 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-04-30 10:46:14,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-30 10:46:14,589 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-04-30 10:46:14,589 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2025-04-30 10:46:14,648 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2025-04-30 10:46:14,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 47 transitions, 240 flow. Second operand has 9 states, 9 states have (on average 21.0) internal successors, (189), 9 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:46:14,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-30 10:46:14,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2025-04-30 10:46:14,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-30 10:46:14,768 INFO L116 PetriNetUnfolderBase]: 20/121 cut-off events. [2025-04-30 10:46:14,768 INFO L117 PetriNetUnfolderBase]: For 153/153 co-relation queries the response was YES. [2025-04-30 10:46:14,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 354 conditions, 121 events. 20/121 cut-off events. For 153/153 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 237 event pairs, 9 based on Foata normal form. 1/120 useless extension candidates. Maximal degree in co-relation 326. Up to 45 conditions per place. [2025-04-30 10:46:14,769 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 24 selfloop transitions, 7 changer transitions 8/53 dead transitions. [2025-04-30 10:46:14,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 53 transitions, 329 flow [2025-04-30 10:46:14,769 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-04-30 10:46:14,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-04-30 10:46:14,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 226 transitions. [2025-04-30 10:46:14,770 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4808510638297872 [2025-04-30 10:46:14,770 INFO L175 Difference]: Start difference. First operand has 67 places, 47 transitions, 240 flow. Second operand 10 states and 226 transitions. [2025-04-30 10:46:14,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 53 transitions, 329 flow [2025-04-30 10:46:14,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 53 transitions, 319 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-04-30 10:46:14,772 INFO L231 Difference]: Finished difference. Result has 73 places, 42 transitions, 215 flow [2025-04-30 10:46:14,772 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=215, PETRI_PLACES=73, PETRI_TRANSITIONS=42} [2025-04-30 10:46:14,773 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, 28 predicate places. [2025-04-30 10:46:14,773 INFO L485 AbstractCegarLoop]: Abstraction has has 73 places, 42 transitions, 215 flow [2025-04-30 10:46:14,773 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 21.0) internal successors, (189), 9 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:46:14,773 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-30 10:46:14,773 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:46:14,773 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-04-30 10:46:14,773 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-04-30 10:46:14,775 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:46:14,775 INFO L85 PathProgramCache]: Analyzing trace with hash 55891920, now seen corresponding path program 1 times [2025-04-30 10:46:14,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-30 10:46:14,775 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401908838] [2025-04-30 10:46:14,775 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-30 10:46:14,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-30 10:46:14,780 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-04-30 10:46:14,787 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-04-30 10:46:14,787 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:46:14,787 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:46:14,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:46:14,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-30 10:46:14,912 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401908838] [2025-04-30 10:46:14,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401908838] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-30 10:46:14,912 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103259122] [2025-04-30 10:46:14,912 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-30 10:46:14,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:46:14,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-30 10:46:14,914 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-30 10:46:14,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-04-30 10:46:14,960 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-04-30 10:46:14,978 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-04-30 10:46:14,978 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:46:14,978 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:46:14,979 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-04-30 10:46:14,980 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-30 10:46:15,084 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-04-30 10:46:15,094 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:46:15,094 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-30 10:46:15,146 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:46:15,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103259122] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-30 10:46:15,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-30 10:46:15,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2025-04-30 10:46:15,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058835575] [2025-04-30 10:46:15,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-30 10:46:15,147 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-04-30 10:46:15,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-30 10:46:15,149 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-04-30 10:46:15,149 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2025-04-30 10:46:15,286 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 47 [2025-04-30 10:46:15,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 42 transitions, 215 flow. Second operand has 14 states, 14 states have (on average 26.071428571428573) internal successors, (365), 14 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:46:15,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-30 10:46:15,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 47 [2025-04-30 10:46:15,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-30 10:46:15,403 INFO L116 PetriNetUnfolderBase]: 19/110 cut-off events. [2025-04-30 10:46:15,403 INFO L117 PetriNetUnfolderBase]: For 131/131 co-relation queries the response was YES. [2025-04-30 10:46:15,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 317 conditions, 110 events. 19/110 cut-off events. For 131/131 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 182 event pairs, 9 based on Foata normal form. 2/111 useless extension candidates. Maximal degree in co-relation 293. Up to 41 conditions per place. [2025-04-30 10:46:15,404 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 24 selfloop transitions, 6 changer transitions 1/46 dead transitions. [2025-04-30 10:46:15,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 46 transitions, 280 flow [2025-04-30 10:46:15,404 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-04-30 10:46:15,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-04-30 10:46:15,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 191 transitions. [2025-04-30 10:46:15,405 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5805471124620061 [2025-04-30 10:46:15,405 INFO L175 Difference]: Start difference. First operand has 73 places, 42 transitions, 215 flow. Second operand 7 states and 191 transitions. [2025-04-30 10:46:15,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 46 transitions, 280 flow [2025-04-30 10:46:15,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 46 transitions, 258 flow, removed 2 selfloop flow, removed 10 redundant places. [2025-04-30 10:46:15,406 INFO L231 Difference]: Finished difference. Result has 65 places, 41 transitions, 203 flow [2025-04-30 10:46:15,407 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=203, PETRI_PLACES=65, PETRI_TRANSITIONS=41} [2025-04-30 10:46:15,407 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, 20 predicate places. [2025-04-30 10:46:15,407 INFO L485 AbstractCegarLoop]: Abstraction has has 65 places, 41 transitions, 203 flow [2025-04-30 10:46:15,407 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 26.071428571428573) internal successors, (365), 14 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:46:15,407 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-30 10:46:15,407 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:46:15,415 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-04-30 10:46:15,608 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:46:15,608 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-04-30 10:46:15,608 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:46:15,609 INFO L85 PathProgramCache]: Analyzing trace with hash -962070074, now seen corresponding path program 2 times [2025-04-30 10:46:15,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-30 10:46:15,609 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576050870] [2025-04-30 10:46:15,609 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-30 10:46:15,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-30 10:46:15,617 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 35 statements into 2 equivalence classes. [2025-04-30 10:46:15,627 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 35 of 35 statements. [2025-04-30 10:46:15,627 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-30 10:46:15,627 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:46:15,777 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:46:15,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-30 10:46:15,778 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576050870] [2025-04-30 10:46:15,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576050870] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-30 10:46:15,778 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451207518] [2025-04-30 10:46:15,778 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-30 10:46:15,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:46:15,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-30 10:46:15,780 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-30 10:46:15,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-04-30 10:46:15,822 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 35 statements into 2 equivalence classes. [2025-04-30 10:46:15,840 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 35 of 35 statements. [2025-04-30 10:46:15,840 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-30 10:46:15,840 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:46:15,841 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-04-30 10:46:15,842 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-30 10:46:15,871 INFO L325 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-04-30 10:46:15,872 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-04-30 10:46:15,874 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-04-30 10:46:16,118 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:46:16,118 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-30 10:46:16,338 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:46:16,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451207518] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-30 10:46:16,338 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-30 10:46:16,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2025-04-30 10:46:16,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957162215] [2025-04-30 10:46:16,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-30 10:46:16,339 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-04-30 10:46:16,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-30 10:46:16,341 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-04-30 10:46:16,341 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2025-04-30 10:46:16,727 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 47 [2025-04-30 10:46:16,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 41 transitions, 203 flow. Second operand has 23 states, 23 states have (on average 21.391304347826086) internal successors, (492), 23 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:46:16,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-30 10:46:16,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 47 [2025-04-30 10:46:16,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-30 10:46:17,053 INFO L116 PetriNetUnfolderBase]: 50/197 cut-off events. [2025-04-30 10:46:17,053 INFO L117 PetriNetUnfolderBase]: For 361/361 co-relation queries the response was YES. [2025-04-30 10:46:17,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 624 conditions, 197 events. 50/197 cut-off events. For 361/361 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 307 event pairs, 6 based on Foata normal form. 8/204 useless extension candidates. Maximal degree in co-relation 588. Up to 40 conditions per place. [2025-04-30 10:46:17,055 INFO L140 encePairwiseOnDemand]: 41/47 looper letters, 47 selfloop transitions, 17 changer transitions 0/76 dead transitions. [2025-04-30 10:46:17,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 76 transitions, 491 flow [2025-04-30 10:46:17,055 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-04-30 10:46:17,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-04-30 10:46:17,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 266 transitions. [2025-04-30 10:46:17,056 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5145067698259188 [2025-04-30 10:46:17,056 INFO L175 Difference]: Start difference. First operand has 65 places, 41 transitions, 203 flow. Second operand 11 states and 266 transitions. [2025-04-30 10:46:17,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 76 transitions, 491 flow [2025-04-30 10:46:17,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 76 transitions, 479 flow, removed 1 selfloop flow, removed 5 redundant places. [2025-04-30 10:46:17,058 INFO L231 Difference]: Finished difference. Result has 74 places, 50 transitions, 335 flow [2025-04-30 10:46:17,058 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=335, PETRI_PLACES=74, PETRI_TRANSITIONS=50} [2025-04-30 10:46:17,059 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, 29 predicate places. [2025-04-30 10:46:17,060 INFO L485 AbstractCegarLoop]: Abstraction has has 74 places, 50 transitions, 335 flow [2025-04-30 10:46:17,061 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 21.391304347826086) internal successors, (492), 23 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:46:17,061 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-30 10:46:17,061 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:46:17,067 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-04-30 10:46:17,265 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:46:17,265 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-04-30 10:46:17,265 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:46:17,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1131363832, now seen corresponding path program 2 times [2025-04-30 10:46:17,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-30 10:46:17,265 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495756869] [2025-04-30 10:46:17,265 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-30 10:46:17,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-30 10:46:17,271 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-04-30 10:46:17,275 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 13 of 37 statements. [2025-04-30 10:46:17,275 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-04-30 10:46:17,275 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:46:17,366 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2025-04-30 10:46:17,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-30 10:46:17,367 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495756869] [2025-04-30 10:46:17,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495756869] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-30 10:46:17,367 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23812885] [2025-04-30 10:46:17,367 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-30 10:46:17,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:46:17,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-30 10:46:17,369 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-30 10:46:17,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-04-30 10:46:17,420 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-04-30 10:46:17,430 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 13 of 37 statements. [2025-04-30 10:46:17,430 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-04-30 10:46:17,430 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:46:17,431 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-04-30 10:46:17,432 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-30 10:46:17,458 INFO L325 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-04-30 10:46:17,460 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-04-30 10:46:17,468 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-04-30 10:46:17,767 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2025-04-30 10:46:17,767 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-30 10:46:18,102 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2025-04-30 10:46:18,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23812885] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-30 10:46:18,103 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-30 10:46:18,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2025-04-30 10:46:18,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961420671] [2025-04-30 10:46:18,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-30 10:46:18,103 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-04-30 10:46:18,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-30 10:46:18,104 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-04-30 10:46:18,104 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2025-04-30 10:46:18,289 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2025-04-30 10:46:18,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 50 transitions, 335 flow. Second operand has 14 states, 14 states have (on average 22.214285714285715) internal successors, (311), 14 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:46:18,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-30 10:46:18,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2025-04-30 10:46:18,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-30 10:46:18,395 INFO L116 PetriNetUnfolderBase]: 57/196 cut-off events. [2025-04-30 10:46:18,395 INFO L117 PetriNetUnfolderBase]: For 583/583 co-relation queries the response was YES. [2025-04-30 10:46:18,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 675 conditions, 196 events. 57/196 cut-off events. For 583/583 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 279 event pairs, 2 based on Foata normal form. 8/203 useless extension candidates. Maximal degree in co-relation 634. Up to 80 conditions per place. [2025-04-30 10:46:18,396 INFO L140 encePairwiseOnDemand]: 40/47 looper letters, 24 selfloop transitions, 20 changer transitions 0/54 dead transitions. [2025-04-30 10:46:18,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 54 transitions, 425 flow [2025-04-30 10:46:18,397 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-04-30 10:46:18,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-04-30 10:46:18,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2025-04-30 10:46:18,397 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5 [2025-04-30 10:46:18,397 INFO L175 Difference]: Start difference. First operand has 74 places, 50 transitions, 335 flow. Second operand 6 states and 141 transitions. [2025-04-30 10:46:18,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 54 transitions, 425 flow [2025-04-30 10:46:18,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 54 transitions, 398 flow, removed 0 selfloop flow, removed 8 redundant places. [2025-04-30 10:46:18,400 INFO L231 Difference]: Finished difference. Result has 71 places, 50 transitions, 355 flow [2025-04-30 10:46:18,400 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=355, PETRI_PLACES=71, PETRI_TRANSITIONS=50} [2025-04-30 10:46:18,400 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, 26 predicate places. [2025-04-30 10:46:18,400 INFO L485 AbstractCegarLoop]: Abstraction has has 71 places, 50 transitions, 355 flow [2025-04-30 10:46:18,401 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 22.214285714285715) internal successors, (311), 14 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:46:18,401 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-30 10:46:18,401 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:46:18,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-04-30 10:46:18,601 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-04-30 10:46:18,602 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-04-30 10:46:18,602 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:46:18,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1894038446, now seen corresponding path program 1 times [2025-04-30 10:46:18,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-30 10:46:18,602 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864883547] [2025-04-30 10:46:18,602 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-30 10:46:18,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-30 10:46:18,607 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-04-30 10:46:18,611 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-04-30 10:46:18,612 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:46:18,612 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:46:18,733 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-30 10:46:18,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-30 10:46:18,733 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864883547] [2025-04-30 10:46:18,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864883547] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-30 10:46:18,733 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296291295] [2025-04-30 10:46:18,733 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-30 10:46:18,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:46:18,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-30 10:46:18,736 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-30 10:46:18,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-04-30 10:46:18,783 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-04-30 10:46:18,799 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-04-30 10:46:18,799 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:46:18,799 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:46:18,801 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-04-30 10:46:18,802 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-30 10:46:18,921 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-04-30 10:46:18,928 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-30 10:46:18,928 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-30 10:46:18,995 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-30 10:46:18,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296291295] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-30 10:46:18,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-30 10:46:18,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2025-04-30 10:46:18,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052496901] [2025-04-30 10:46:18,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-30 10:46:18,996 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-04-30 10:46:18,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-30 10:46:18,996 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-04-30 10:46:18,996 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2025-04-30 10:46:19,194 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 47 [2025-04-30 10:46:19,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 50 transitions, 355 flow. Second operand has 17 states, 17 states have (on average 25.88235294117647) internal successors, (440), 17 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:46:19,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-30 10:46:19,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 47 [2025-04-30 10:46:19,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-30 10:46:19,339 INFO L116 PetriNetUnfolderBase]: 35/172 cut-off events. [2025-04-30 10:46:19,340 INFO L117 PetriNetUnfolderBase]: For 633/633 co-relation queries the response was YES. [2025-04-30 10:46:19,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 603 conditions, 172 events. 35/172 cut-off events. For 633/633 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 250 event pairs, 18 based on Foata normal form. 2/173 useless extension candidates. Maximal degree in co-relation 562. Up to 74 conditions per place. [2025-04-30 10:46:19,341 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 32 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2025-04-30 10:46:19,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 55 transitions, 437 flow [2025-04-30 10:46:19,341 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-04-30 10:46:19,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-04-30 10:46:19,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 216 transitions. [2025-04-30 10:46:19,344 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.574468085106383 [2025-04-30 10:46:19,344 INFO L175 Difference]: Start difference. First operand has 71 places, 50 transitions, 355 flow. Second operand 8 states and 216 transitions. [2025-04-30 10:46:19,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 55 transitions, 437 flow [2025-04-30 10:46:19,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 55 transitions, 410 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-04-30 10:46:19,346 INFO L231 Difference]: Finished difference. Result has 76 places, 50 transitions, 344 flow [2025-04-30 10:46:19,346 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=344, PETRI_PLACES=76, PETRI_TRANSITIONS=50} [2025-04-30 10:46:19,347 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, 31 predicate places. [2025-04-30 10:46:19,347 INFO L485 AbstractCegarLoop]: Abstraction has has 76 places, 50 transitions, 344 flow [2025-04-30 10:46:19,347 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 25.88235294117647) internal successors, (440), 17 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:46:19,347 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-30 10:46:19,347 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:46:19,352 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-04-30 10:46:19,547 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:46:19,548 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-04-30 10:46:19,548 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:46:19,548 INFO L85 PathProgramCache]: Analyzing trace with hash 784914715, now seen corresponding path program 2 times [2025-04-30 10:46:19,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-30 10:46:19,548 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559941285] [2025-04-30 10:46:19,548 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-30 10:46:19,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-30 10:46:19,554 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 44 statements into 2 equivalence classes. [2025-04-30 10:46:19,559 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 44 of 44 statements. [2025-04-30 10:46:19,563 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-30 10:46:19,563 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:46:19,706 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-30 10:46:19,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-30 10:46:19,707 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559941285] [2025-04-30 10:46:19,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559941285] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-30 10:46:19,707 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320906322] [2025-04-30 10:46:19,707 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-30 10:46:19,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:46:19,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-30 10:46:19,709 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-30 10:46:19,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-04-30 10:46:19,749 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 44 statements into 2 equivalence classes. [2025-04-30 10:46:19,768 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 44 of 44 statements. [2025-04-30 10:46:19,768 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-30 10:46:19,768 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:46:19,769 INFO L256 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-04-30 10:46:19,770 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-30 10:46:19,928 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-04-30 10:46:19,938 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-30 10:46:19,938 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-30 10:46:20,030 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-30 10:46:20,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320906322] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-30 10:46:20,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-30 10:46:20,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2025-04-30 10:46:20,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467660427] [2025-04-30 10:46:20,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-30 10:46:20,031 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-04-30 10:46:20,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-30 10:46:20,031 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-04-30 10:46:20,031 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2025-04-30 10:46:20,314 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 47 [2025-04-30 10:46:20,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 50 transitions, 344 flow. Second operand has 20 states, 20 states have (on average 25.85) internal successors, (517), 20 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:46:20,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-30 10:46:20,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 47 [2025-04-30 10:46:20,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-30 10:46:20,508 INFO L116 PetriNetUnfolderBase]: 32/167 cut-off events. [2025-04-30 10:46:20,508 INFO L117 PetriNetUnfolderBase]: For 558/558 co-relation queries the response was YES. [2025-04-30 10:46:20,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 585 conditions, 167 events. 32/167 cut-off events. For 558/558 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 239 event pairs, 15 based on Foata normal form. 2/168 useless extension candidates. Maximal degree in co-relation 544. Up to 63 conditions per place. [2025-04-30 10:46:20,509 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 32 selfloop transitions, 8 changer transitions 0/56 dead transitions. [2025-04-30 10:46:20,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 56 transitions, 433 flow [2025-04-30 10:46:20,509 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-04-30 10:46:20,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-04-30 10:46:20,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 242 transitions. [2025-04-30 10:46:20,510 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5721040189125296 [2025-04-30 10:46:20,510 INFO L175 Difference]: Start difference. First operand has 76 places, 50 transitions, 344 flow. Second operand 9 states and 242 transitions. [2025-04-30 10:46:20,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 56 transitions, 433 flow [2025-04-30 10:46:20,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 56 transitions, 417 flow, removed 2 selfloop flow, removed 6 redundant places. [2025-04-30 10:46:20,512 INFO L231 Difference]: Finished difference. Result has 80 places, 50 transitions, 349 flow [2025-04-30 10:46:20,512 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=349, PETRI_PLACES=80, PETRI_TRANSITIONS=50} [2025-04-30 10:46:20,512 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, 35 predicate places. [2025-04-30 10:46:20,512 INFO L485 AbstractCegarLoop]: Abstraction has has 80 places, 50 transitions, 349 flow [2025-04-30 10:46:20,513 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 25.85) internal successors, (517), 20 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:46:20,513 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-30 10:46:20,513 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:46:20,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-04-30 10:46:20,718 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:46:20,718 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-04-30 10:46:20,718 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:46:20,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1065655884, now seen corresponding path program 3 times [2025-04-30 10:46:20,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-30 10:46:20,719 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059599004] [2025-04-30 10:46:20,719 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-30 10:46:20,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-30 10:46:20,729 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 50 statements into 6 equivalence classes. [2025-04-30 10:46:20,755 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 50 of 50 statements. [2025-04-30 10:46:20,756 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-04-30 10:46:20,756 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:46:21,211 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 2 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-30 10:46:21,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-30 10:46:21,212 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059599004] [2025-04-30 10:46:21,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059599004] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-30 10:46:21,212 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641006380] [2025-04-30 10:46:21,212 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-30 10:46:21,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:46:21,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-30 10:46:21,214 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-30 10:46:21,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-04-30 10:46:21,256 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 50 statements into 6 equivalence classes. [2025-04-30 10:46:21,289 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 50 of 50 statements. [2025-04-30 10:46:21,289 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-04-30 10:46:21,289 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:46:21,290 INFO L256 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-04-30 10:46:21,292 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-30 10:46:21,515 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-04-30 10:46:21,528 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 2 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-30 10:46:21,530 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-30 10:46:21,650 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 2 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-30 10:46:21,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641006380] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-30 10:46:21,650 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-30 10:46:21,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 24 [2025-04-30 10:46:21,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275678373] [2025-04-30 10:46:21,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-30 10:46:21,650 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-04-30 10:46:21,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-30 10:46:21,651 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-04-30 10:46:21,651 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2025-04-30 10:46:22,005 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 47 [2025-04-30 10:46:22,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 50 transitions, 349 flow. Second operand has 25 states, 25 states have (on average 23.72) internal successors, (593), 25 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:46:22,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-30 10:46:22,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 47 [2025-04-30 10:46:22,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-30 10:46:22,451 INFO L116 PetriNetUnfolderBase]: 45/178 cut-off events. [2025-04-30 10:46:22,451 INFO L117 PetriNetUnfolderBase]: For 619/619 co-relation queries the response was YES. [2025-04-30 10:46:22,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 643 conditions, 178 events. 45/178 cut-off events. For 619/619 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 246 event pairs, 16 based on Foata normal form. 2/179 useless extension candidates. Maximal degree in co-relation 600. Up to 66 conditions per place. [2025-04-30 10:46:22,452 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 47 selfloop transitions, 11 changer transitions 0/68 dead transitions. [2025-04-30 10:46:22,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 68 transitions, 533 flow [2025-04-30 10:46:22,457 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-04-30 10:46:22,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-04-30 10:46:22,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 294 transitions. [2025-04-30 10:46:22,458 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5212765957446809 [2025-04-30 10:46:22,458 INFO L175 Difference]: Start difference. First operand has 80 places, 50 transitions, 349 flow. Second operand 12 states and 294 transitions. [2025-04-30 10:46:22,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 68 transitions, 533 flow [2025-04-30 10:46:22,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 68 transitions, 513 flow, removed 3 selfloop flow, removed 7 redundant places. [2025-04-30 10:46:22,462 INFO L231 Difference]: Finished difference. Result has 86 places, 50 transitions, 357 flow [2025-04-30 10:46:22,462 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=357, PETRI_PLACES=86, PETRI_TRANSITIONS=50} [2025-04-30 10:46:22,463 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, 41 predicate places. [2025-04-30 10:46:22,463 INFO L485 AbstractCegarLoop]: Abstraction has has 86 places, 50 transitions, 357 flow [2025-04-30 10:46:22,463 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 23.72) internal successors, (593), 25 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:46:22,463 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-30 10:46:22,463 INFO L206 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:46:22,472 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-04-30 10:46:22,663 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-04-30 10:46:22,664 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-04-30 10:46:22,664 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:46:22,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1312730227, now seen corresponding path program 4 times [2025-04-30 10:46:22,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-30 10:46:22,664 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725608143] [2025-04-30 10:46:22,664 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-30 10:46:22,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-30 10:46:22,671 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 56 statements into 2 equivalence classes. [2025-04-30 10:46:22,681 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 56 of 56 statements. [2025-04-30 10:46:22,682 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-30 10:46:22,682 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:46:22,866 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 2 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-30 10:46:22,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-30 10:46:22,867 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725608143] [2025-04-30 10:46:22,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725608143] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-30 10:46:22,867 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627545767] [2025-04-30 10:46:22,867 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-30 10:46:22,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:46:22,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-30 10:46:22,869 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-30 10:46:22,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-04-30 10:46:22,915 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 56 statements into 2 equivalence classes. [2025-04-30 10:46:22,944 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 56 of 56 statements. [2025-04-30 10:46:22,944 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-30 10:46:22,944 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:46:22,945 INFO L256 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-04-30 10:46:22,947 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-30 10:46:23,195 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-04-30 10:46:23,203 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 2 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-30 10:46:23,204 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-30 10:46:23,323 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 2 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-30 10:46:23,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627545767] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-30 10:46:23,324 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-30 10:46:23,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2025-04-30 10:46:23,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419438474] [2025-04-30 10:46:23,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-30 10:46:23,324 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-04-30 10:46:23,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-30 10:46:23,325 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-04-30 10:46:23,325 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2025-04-30 10:46:23,662 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 47 [2025-04-30 10:46:23,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 50 transitions, 357 flow. Second operand has 26 states, 26 states have (on average 25.653846153846153) internal successors, (667), 26 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:46:23,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-30 10:46:23,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 47 [2025-04-30 10:46:23,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-30 10:46:23,848 INFO L116 PetriNetUnfolderBase]: 26/157 cut-off events. [2025-04-30 10:46:23,848 INFO L117 PetriNetUnfolderBase]: For 626/626 co-relation queries the response was YES. [2025-04-30 10:46:23,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 565 conditions, 157 events. 26/157 cut-off events. For 626/626 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 200 event pairs, 9 based on Foata normal form. 2/158 useless extension candidates. Maximal degree in co-relation 520. Up to 41 conditions per place. [2025-04-30 10:46:23,849 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 32 selfloop transitions, 10 changer transitions 0/58 dead transitions. [2025-04-30 10:46:23,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 58 transitions, 457 flow [2025-04-30 10:46:23,849 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-04-30 10:46:23,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-04-30 10:46:23,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 294 transitions. [2025-04-30 10:46:23,850 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5686653771760155 [2025-04-30 10:46:23,850 INFO L175 Difference]: Start difference. First operand has 86 places, 50 transitions, 357 flow. Second operand 11 states and 294 transitions. [2025-04-30 10:46:23,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 58 transitions, 457 flow [2025-04-30 10:46:23,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 58 transitions, 429 flow, removed 4 selfloop flow, removed 10 redundant places. [2025-04-30 10:46:23,853 INFO L231 Difference]: Finished difference. Result has 88 places, 50 transitions, 357 flow [2025-04-30 10:46:23,853 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=357, PETRI_PLACES=88, PETRI_TRANSITIONS=50} [2025-04-30 10:46:23,853 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, 43 predicate places. [2025-04-30 10:46:23,853 INFO L485 AbstractCegarLoop]: Abstraction has has 88 places, 50 transitions, 357 flow [2025-04-30 10:46:23,854 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 25.653846153846153) internal successors, (667), 26 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:46:23,854 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-30 10:46:23,854 INFO L206 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:46:23,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-04-30 10:46:24,054 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-04-30 10:46:24,055 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-04-30 10:46:24,055 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:46:24,055 INFO L85 PathProgramCache]: Analyzing trace with hash 253865826, now seen corresponding path program 3 times [2025-04-30 10:46:24,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-30 10:46:24,055 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966574633] [2025-04-30 10:46:24,055 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-30 10:46:24,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-30 10:46:24,061 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 59 statements into 9 equivalence classes. [2025-04-30 10:46:24,064 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 17 of 59 statements. [2025-04-30 10:46:24,064 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-30 10:46:24,064 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:46:24,187 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2025-04-30 10:46:24,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-30 10:46:24,188 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966574633] [2025-04-30 10:46:24,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966574633] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-30 10:46:24,188 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100950233] [2025-04-30 10:46:24,188 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-30 10:46:24,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:46:24,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-30 10:46:24,190 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-30 10:46:24,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-04-30 10:46:24,233 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 59 statements into 9 equivalence classes. [2025-04-30 10:46:24,244 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 17 of 59 statements. [2025-04-30 10:46:24,245 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-30 10:46:24,245 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:46:24,245 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-04-30 10:46:24,247 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-30 10:46:24,276 INFO L325 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-04-30 10:46:24,276 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2025-04-30 10:46:24,284 INFO L325 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-04-30 10:46:24,285 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-04-30 10:46:24,592 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-30 10:46:24,593 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2025-04-30 10:46:24,643 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 21 proven. 23 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2025-04-30 10:46:24,644 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-30 10:46:24,872 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2025-04-30 10:46:24,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100950233] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-30 10:46:24,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-30 10:46:24,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 17 [2025-04-30 10:46:24,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539096549] [2025-04-30 10:46:24,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-30 10:46:24,873 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-04-30 10:46:24,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-30 10:46:24,873 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-04-30 10:46:24,873 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2025-04-30 10:46:25,136 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 47 [2025-04-30 10:46:25,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 50 transitions, 357 flow. Second operand has 19 states, 19 states have (on average 20.68421052631579) internal successors, (393), 19 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:46:25,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-30 10:46:25,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 47 [2025-04-30 10:46:25,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-30 10:46:25,284 INFO L116 PetriNetUnfolderBase]: 43/172 cut-off events. [2025-04-30 10:46:25,284 INFO L117 PetriNetUnfolderBase]: For 641/641 co-relation queries the response was YES. [2025-04-30 10:46:25,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 621 conditions, 172 events. 43/172 cut-off events. For 641/641 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 209 event pairs, 3 based on Foata normal form. 2/173 useless extension candidates. Maximal degree in co-relation 574. Up to 71 conditions per place. [2025-04-30 10:46:25,285 INFO L140 encePairwiseOnDemand]: 41/47 looper letters, 24 selfloop transitions, 19 changer transitions 0/53 dead transitions. [2025-04-30 10:46:25,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 53 transitions, 433 flow [2025-04-30 10:46:25,286 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-04-30 10:46:25,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-04-30 10:46:25,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2025-04-30 10:46:25,287 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4858156028368794 [2025-04-30 10:46:25,287 INFO L175 Difference]: Start difference. First operand has 88 places, 50 transitions, 357 flow. Second operand 6 states and 137 transitions. [2025-04-30 10:46:25,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 53 transitions, 433 flow [2025-04-30 10:46:25,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 53 transitions, 378 flow, removed 5 selfloop flow, removed 17 redundant places. [2025-04-30 10:46:25,290 INFO L231 Difference]: Finished difference. Result has 75 places, 49 transitions, 322 flow [2025-04-30 10:46:25,290 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=322, PETRI_PLACES=75, PETRI_TRANSITIONS=49} [2025-04-30 10:46:25,291 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, 30 predicate places. [2025-04-30 10:46:25,291 INFO L485 AbstractCegarLoop]: Abstraction has has 75 places, 49 transitions, 322 flow [2025-04-30 10:46:25,291 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 20.68421052631579) internal successors, (393), 19 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:46:25,291 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-30 10:46:25,291 INFO L206 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:46:25,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-04-30 10:46:25,495 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-04-30 10:46:25,495 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-04-30 10:46:25,495 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:46:25,495 INFO L85 PathProgramCache]: Analyzing trace with hash 2086260882, now seen corresponding path program 5 times [2025-04-30 10:46:25,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-30 10:46:25,495 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044717922] [2025-04-30 10:46:25,495 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-30 10:46:25,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-30 10:46:25,502 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 62 statements into 8 equivalence classes. [2025-04-30 10:46:25,516 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) and asserted 60 of 62 statements. [2025-04-30 10:46:25,516 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2025-04-30 10:46:25,516 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:46:25,720 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 2 proven. 126 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-30 10:46:25,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-30 10:46:25,720 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044717922] [2025-04-30 10:46:25,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044717922] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-30 10:46:25,720 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415052075] [2025-04-30 10:46:25,720 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-30 10:46:25,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:46:25,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-30 10:46:25,722 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-30 10:46:25,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-04-30 10:46:25,771 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 62 statements into 8 equivalence classes. [2025-04-30 10:46:25,801 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) and asserted 60 of 62 statements. [2025-04-30 10:46:25,801 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2025-04-30 10:46:25,801 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:46:25,802 INFO L256 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-04-30 10:46:25,804 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-30 10:46:26,064 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-04-30 10:46:26,073 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 2 proven. 126 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-30 10:46:26,073 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-30 10:46:26,234 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 2 proven. 126 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-30 10:46:26,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415052075] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-30 10:46:26,234 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-30 10:46:26,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2025-04-30 10:46:26,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111985826] [2025-04-30 10:46:26,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-30 10:46:26,234 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-04-30 10:46:26,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-30 10:46:26,235 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-04-30 10:46:26,235 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2025-04-30 10:46:26,757 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 47 [2025-04-30 10:46:26,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 49 transitions, 322 flow. Second operand has 29 states, 29 states have (on average 25.517241379310345) internal successors, (740), 29 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:46:26,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-30 10:46:26,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 47 [2025-04-30 10:46:26,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-30 10:46:27,027 INFO L116 PetriNetUnfolderBase]: 23/156 cut-off events. [2025-04-30 10:46:27,027 INFO L117 PetriNetUnfolderBase]: For 492/492 co-relation queries the response was YES. [2025-04-30 10:46:27,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 517 conditions, 156 events. 23/156 cut-off events. For 492/492 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 172 event pairs, 6 based on Foata normal form. 2/157 useless extension candidates. Maximal degree in co-relation 478. Up to 32 conditions per place. [2025-04-30 10:46:27,028 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 32 selfloop transitions, 11 changer transitions 0/58 dead transitions. [2025-04-30 10:46:27,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 58 transitions, 430 flow [2025-04-30 10:46:27,030 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-04-30 10:46:27,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-04-30 10:46:27,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 320 transitions. [2025-04-30 10:46:27,031 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5673758865248227 [2025-04-30 10:46:27,031 INFO L175 Difference]: Start difference. First operand has 75 places, 49 transitions, 322 flow. Second operand 12 states and 320 transitions. [2025-04-30 10:46:27,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 58 transitions, 430 flow [2025-04-30 10:46:27,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 58 transitions, 424 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-04-30 10:46:27,033 INFO L231 Difference]: Finished difference. Result has 85 places, 49 transitions, 350 flow [2025-04-30 10:46:27,033 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=350, PETRI_PLACES=85, PETRI_TRANSITIONS=49} [2025-04-30 10:46:27,034 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, 40 predicate places. [2025-04-30 10:46:27,034 INFO L485 AbstractCegarLoop]: Abstraction has has 85 places, 49 transitions, 350 flow [2025-04-30 10:46:27,034 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 25.517241379310345) internal successors, (740), 29 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:46:27,034 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-30 10:46:27,034 INFO L206 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:46:27,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-04-30 10:46:27,239 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:46:27,239 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-04-30 10:46:27,240 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:46:27,240 INFO L85 PathProgramCache]: Analyzing trace with hash 673952511, now seen corresponding path program 6 times [2025-04-30 10:46:27,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-30 10:46:27,240 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496871263] [2025-04-30 10:46:27,240 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-30 10:46:27,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-30 10:46:27,249 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 68 statements into 9 equivalence classes. [2025-04-30 10:46:27,274 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) and asserted 68 of 68 statements. [2025-04-30 10:46:27,278 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2025-04-30 10:46:27,278 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-30 10:46:27,278 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-30 10:46:27,281 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 68 statements into 1 equivalence classes. [2025-04-30 10:46:27,290 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 68 of 68 statements. [2025-04-30 10:46:27,292 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:46:27,292 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-30 10:46:27,317 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-30 10:46:27,317 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-04-30 10:46:27,318 INFO L790 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (17 of 18 remaining) [2025-04-30 10:46:27,319 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE (16 of 18 remaining) [2025-04-30 10:46:27,319 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE (15 of 18 remaining) [2025-04-30 10:46:27,319 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (14 of 18 remaining) [2025-04-30 10:46:27,319 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (13 of 18 remaining) [2025-04-30 10:46:27,319 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 18 remaining) [2025-04-30 10:46:27,319 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 18 remaining) [2025-04-30 10:46:27,319 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 18 remaining) [2025-04-30 10:46:27,319 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 18 remaining) [2025-04-30 10:46:27,320 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (8 of 18 remaining) [2025-04-30 10:46:27,320 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 18 remaining) [2025-04-30 10:46:27,320 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 18 remaining) [2025-04-30 10:46:27,320 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE (5 of 18 remaining) [2025-04-30 10:46:27,320 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE (4 of 18 remaining) [2025-04-30 10:46:27,320 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (3 of 18 remaining) [2025-04-30 10:46:27,320 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (2 of 18 remaining) [2025-04-30 10:46:27,320 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 18 remaining) [2025-04-30 10:46:27,320 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 18 remaining) [2025-04-30 10:46:27,320 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2025-04-30 10:46:27,320 INFO L422 BasicCegarLoop]: Path program histogram: [6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:46:27,382 INFO L242 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-04-30 10:46:27,382 INFO L171 ceAbstractionStarter]: Computing trace abstraction results [2025-04-30 10:46:27,384 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.04 10:46:27 BasicIcfg [2025-04-30 10:46:27,384 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-04-30 10:46:27,385 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-04-30 10:46:27,385 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-04-30 10:46:27,385 INFO L274 PluginConnector]: Witness Printer initialized [2025-04-30 10:46:27,385 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.04 10:46:10" (3/4) ... [2025-04-30 10:46:27,386 INFO L149 WitnessPrinter]: No result that supports witness generation found [2025-04-30 10:46:27,387 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-04-30 10:46:27,387 INFO L158 Benchmark]: Toolchain (without parser) took 17866.36ms. Allocated memory was 142.6MB in the beginning and 343.9MB in the end (delta: 201.3MB). Free memory was 109.3MB in the beginning and 176.4MB in the end (delta: -67.1MB). Peak memory consumption was 132.7MB. Max. memory is 16.1GB. [2025-04-30 10:46:27,387 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 201.3MB. Free memory is still 128.5MB. There was no memory consumed. Max. memory is 16.1GB. [2025-04-30 10:46:27,387 INFO L158 Benchmark]: CACSL2BoogieTranslator took 531.74ms. Allocated memory is still 142.6MB. Free memory was 109.3MB in the beginning and 74.7MB in the end (delta: 34.6MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. [2025-04-30 10:46:27,388 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.95ms. Allocated memory is still 142.6MB. Free memory was 74.7MB in the beginning and 72.3MB in the end (delta: 2.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-04-30 10:46:27,388 INFO L158 Benchmark]: Boogie Preprocessor took 43.46ms. Allocated memory is still 142.6MB. Free memory was 72.3MB in the beginning and 70.3MB in the end (delta: 2.0MB). There was no memory consumed. Max. memory is 16.1GB. [2025-04-30 10:46:27,388 INFO L158 Benchmark]: RCFGBuilder took 350.06ms. Allocated memory is still 142.6MB. Free memory was 70.3MB in the beginning and 46.1MB in the end (delta: 24.2MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2025-04-30 10:46:27,388 INFO L158 Benchmark]: TraceAbstraction took 16897.36ms. Allocated memory was 142.6MB in the beginning and 343.9MB in the end (delta: 201.3MB). Free memory was 46.1MB in the beginning and 176.4MB in the end (delta: -130.2MB). Peak memory consumption was 65.6MB. Max. memory is 16.1GB. [2025-04-30 10:46:27,388 INFO L158 Benchmark]: Witness Printer took 1.93ms. Allocated memory is still 343.9MB. Free memory is still 176.4MB. There was no memory consumed. Max. memory is 16.1GB. [2025-04-30 10:46:27,389 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 201.3MB. Free memory is still 128.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 531.74ms. Allocated memory is still 142.6MB. Free memory was 109.3MB in the beginning and 74.7MB in the end (delta: 34.6MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 36.95ms. Allocated memory is still 142.6MB. Free memory was 74.7MB in the beginning and 72.3MB in the end (delta: 2.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 43.46ms. Allocated memory is still 142.6MB. Free memory was 72.3MB in the beginning and 70.3MB in the end (delta: 2.0MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 350.06ms. Allocated memory is still 142.6MB. Free memory was 70.3MB in the beginning and 46.1MB in the end (delta: 24.2MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 16897.36ms. Allocated memory was 142.6MB in the beginning and 343.9MB in the end (delta: 201.3MB). Free memory was 46.1MB in the beginning and 176.4MB in the end (delta: -130.2MB). Peak memory consumption was 65.6MB. Max. memory is 16.1GB. * Witness Printer took 1.93ms. Allocated memory is still 343.9MB. Free memory is still 176.4MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 1119]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 1119. Possible FailurePath: [L1108] 0 char *v; [L1121] 0 pthread_t t1, t2; [L1122] FCALL, FORK 0 pthread_create(&t1, 0, thread1, 0) VAL [\at(arg, Pre)={0:0}, t1=-1, v={0:0}] [L1111] 1 v = malloc(sizeof(char) * 8) [L1112] 1 return 0; [L1123] FCALL, JOIN 1 pthread_join(t1, 0) VAL [\at(arg, Pre)={0:0}, \result={0:0}, arg={0:0}, t1=-1, v={-1:0}] [L1124] FCALL, FORK 0 pthread_create(&t2, 0, thread2, 0) VAL [\at(arg, Pre)={0:0}, \result={0:0}, arg={0:0}, t1=-1, t2=0, v={-1:0}] [L1116] COND TRUE 2 \read(*v) [L1116] CALL 2 strcpy(v, "Bigshot") [L1116] RET 2 strcpy(v, "Bigshot") [L1117] 2 return 0; [L1125] FCALL, JOIN 2 pthread_join(t2, 0) VAL [\at(arg, Pre)={0:0}, \result={0:0}, arg={0:0}, t1=-1, t2=0, v={-1:0}] [L1126] EXPR 0 !v || v[0] == 'B' VAL [\at(arg, Pre)={0:0}, \result={0:0}, arg={0:0}, t1=-1, t2=0, v={-1:0}] [L1126] EXPR 0 !v || v[0] == 'B' VAL [\at(arg, Pre)={0:0}, \result={0:0}, arg={0:0}, v={-1:0}] [L1126] EXPR 0 v[0] [L1126] EXPR 0 !v || v[0] == 'B' VAL [\at(arg, Pre)={0:0}, \result={0:0}, arg={0:0}, t1=-1, t2=0, v={-1:0}] [L1126] CALL 0 __VERIFIER_assert(!v || v[0] == 'B') [L1107] COND FALSE 0 !(!expression) VAL [\at(arg, Pre)={0:0}, \at(expression, Pre)=1, \result={0:0}, arg={0:0}, expression=1, v={-1:0}] [L1126] RET 0 __VERIFIER_assert(!v || v[0] == 'B') [L1127] 0 return 0; VAL [\at(arg, Pre)={0:0}, \result=0, \result={0:0}, arg={0:0}, t1=-1, t2=0, v={-1:0}] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 20]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1124]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 1122]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 63 locations, 71 edges, 18 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 16.7s, OverallIterations: 20, TraceHistogramMax: 9, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 6.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2993 SdHoareTripleChecker+Valid, 4.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2655 mSDsluCounter, 2366 SdHoareTripleChecker+Invalid, 3.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2287 mSDsCounter, 81 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 12141 IncrementalHoareTripleChecker+Invalid, 12222 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 81 mSolverCounterUnsat, 79 mSDtfsCounter, 12141 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1065 GetRequests, 768 SyntacticMatches, 0 SemanticMatches, 297 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1374 ImplicationChecksByTransitivity, 2.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=357occurred in iteration=16, InterpolantAutomatonStates: 141, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 6.8s InterpolantComputationTime, 1107 NumberOfCodeBlocks, 971 NumberOfCodeBlocksAsserted, 69 NumberOfCheckSat, 1447 ConstructedInterpolants, 12 QuantifiedInterpolants, 18917 SizeOfPredicates, 42 NumberOfNonLiveVariables, 2176 ConjunctsInSsa, 196 ConjunctsInUnsatCore, 41 InterpolantComputations, 8 PerfectInterpolantSequences, 618/1911 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2025-04-30 10:46:27,400 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/pthread/bigshot_s.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4d8c741fd238f074816319de9a9bd5d97cd9b35eb7f53a276be973ea0c31ecbe --- Real Ultimate output --- This is Ultimate 0.3.0-wip.fs.system-includes-da04345-m [2025-04-30 10:46:29,196 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-30 10:46:29,269 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2025-04-30 10:46:29,273 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-30 10:46:29,273 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-30 10:46:29,293 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-30 10:46:29,295 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-30 10:46:29,295 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-30 10:46:29,296 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-04-30 10:46:29,296 INFO L153 SettingsManager]: * Use memory slicer=true [2025-04-30 10:46:29,296 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-30 10:46:29,296 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-30 10:46:29,296 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-30 10:46:29,296 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-30 10:46:29,296 INFO L153 SettingsManager]: * Use SBE=true [2025-04-30 10:46:29,297 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-30 10:46:29,297 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-30 10:46:29,297 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-30 10:46:29,297 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-30 10:46:29,297 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-30 10:46:29,297 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-04-30 10:46:29,297 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-04-30 10:46:29,297 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-04-30 10:46:29,297 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-30 10:46:29,297 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-04-30 10:46:29,297 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2025-04-30 10:46:29,297 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2025-04-30 10:46:29,298 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-04-30 10:46:29,298 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-30 10:46:29,298 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-30 10:46:29,298 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-30 10:46:29,298 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-30 10:46:29,298 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-30 10:46:29,298 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-30 10:46:29,298 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-30 10:46:29,298 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-30 10:46:29,298 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-30 10:46:29,298 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-30 10:46:29,299 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-30 10:46:29,299 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-30 10:46:29,299 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-30 10:46:29,299 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-30 10:46:29,299 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-30 10:46:29,299 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2025-04-30 10:46:29,299 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2025-04-30 10:46:29,299 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-04-30 10:46:29,299 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-04-30 10:46:29,299 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-30 10:46:29,299 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d8c741fd238f074816319de9a9bd5d97cd9b35eb7f53a276be973ea0c31ecbe [2025-04-30 10:46:29,518 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-30 10:46:29,527 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-30 10:46:29,530 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-30 10:46:29,531 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-30 10:46:29,532 INFO L274 PluginConnector]: CDTParser initialized [2025-04-30 10:46:29,536 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/bigshot_s.i [2025-04-30 10:46:30,857 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5abeb1307/8447eec5231247f29b3f8f4e31325d7b/FLAGec1f8eec2 [2025-04-30 10:46:31,040 INFO L389 CDTParser]: Found 1 translation units. [2025-04-30 10:46:31,040 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/bigshot_s.i [2025-04-30 10:46:31,061 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5abeb1307/8447eec5231247f29b3f8f4e31325d7b/FLAGec1f8eec2 [2025-04-30 10:46:31,909 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5abeb1307/8447eec5231247f29b3f8f4e31325d7b [2025-04-30 10:46:31,912 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-30 10:46:31,914 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-04-30 10:46:31,915 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-30 10:46:31,915 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-30 10:46:31,920 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-30 10:46:31,920 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.04 10:46:31" (1/1) ... [2025-04-30 10:46:31,921 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78a8f464 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:46:31, skipping insertion in model container [2025-04-30 10:46:31,922 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.04 10:46:31" (1/1) ... [2025-04-30 10:46:31,962 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-30 10:46:32,259 INFO L211 PostProcessor]: Analyzing one entry point: main [2025-04-30 10:46:32,273 INFO L200 MainTranslator]: Completed pre-run [2025-04-30 10:46:32,326 INFO L211 PostProcessor]: Analyzing one entry point: main [2025-04-30 10:46:32,374 INFO L204 MainTranslator]: Completed translation [2025-04-30 10:46:32,375 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:46:32 WrapperNode [2025-04-30 10:46:32,375 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-30 10:46:32,377 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-30 10:46:32,377 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-30 10:46:32,377 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-30 10:46:32,381 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:46:32" (1/1) ... [2025-04-30 10:46:32,396 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:46:32" (1/1) ... [2025-04-30 10:46:32,411 INFO L138 Inliner]: procedures = 323, calls = 24, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 68 [2025-04-30 10:46:32,412 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-30 10:46:32,412 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-30 10:46:32,412 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-30 10:46:32,412 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-30 10:46:32,420 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:46:32" (1/1) ... [2025-04-30 10:46:32,420 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:46:32" (1/1) ... [2025-04-30 10:46:32,426 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:46:32" (1/1) ... [2025-04-30 10:46:32,444 INFO L175 MemorySlicer]: Split 13 memory accesses to 3 slices as follows [2, 9, 2]. 69 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0]. The 1 writes are split as follows [0, 0, 1]. [2025-04-30 10:46:32,445 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:46:32" (1/1) ... [2025-04-30 10:46:32,445 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:46:32" (1/1) ... [2025-04-30 10:46:32,456 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:46:32" (1/1) ... [2025-04-30 10:46:32,460 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:46:32" (1/1) ... [2025-04-30 10:46:32,463 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:46:32" (1/1) ... [2025-04-30 10:46:32,468 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:46:32" (1/1) ... [2025-04-30 10:46:32,469 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:46:32" (1/1) ... [2025-04-30 10:46:32,472 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-30 10:46:32,473 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-04-30 10:46:32,473 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-04-30 10:46:32,473 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-04-30 10:46:32,474 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:46:32" (1/1) ... [2025-04-30 10:46:32,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-30 10:46:32,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-30 10:46:32,501 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-04-30 10:46:32,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-04-30 10:46:32,528 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#0 [2025-04-30 10:46:32,528 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#1 [2025-04-30 10:46:32,528 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#2 [2025-04-30 10:46:32,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2025-04-30 10:46:32,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2025-04-30 10:46:32,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2025-04-30 10:46:32,528 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-04-30 10:46:32,528 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-04-30 10:46:32,528 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-04-30 10:46:32,528 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-04-30 10:46:32,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1#0 [2025-04-30 10:46:32,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1#1 [2025-04-30 10:46:32,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1#2 [2025-04-30 10:46:32,529 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-04-30 10:46:32,529 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-04-30 10:46:32,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-30 10:46:32,529 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-30 10:46:32,530 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-04-30 10:46:32,657 INFO L234 CfgBuilder]: Building ICFG [2025-04-30 10:46:32,658 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-30 10:46:32,881 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-30 10:46:32,882 INFO L283 CfgBuilder]: Performing block encoding [2025-04-30 10:46:32,997 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-30 10:46:32,997 INFO L312 CfgBuilder]: Removed 1 assume(true) statements. [2025-04-30 10:46:32,998 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.04 10:46:32 BoogieIcfgContainer [2025-04-30 10:46:32,998 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-04-30 10:46:32,999 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-30 10:46:32,999 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-30 10:46:33,003 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-30 10:46:33,003 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.04 10:46:31" (1/3) ... [2025-04-30 10:46:33,004 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ec8f303 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.04 10:46:33, skipping insertion in model container [2025-04-30 10:46:33,004 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:46:32" (2/3) ... [2025-04-30 10:46:33,005 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ec8f303 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.04 10:46:33, skipping insertion in model container [2025-04-30 10:46:33,005 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.04 10:46:32" (3/3) ... [2025-04-30 10:46:33,006 INFO L128 eAbstractionObserver]: Analyzing ICFG bigshot_s.i [2025-04-30 10:46:33,015 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-30 10:46:33,017 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG bigshot_s.i that has 3 procedures, 42 locations, 45 edges, 1 initial locations, 1 loop locations, and 10 error locations. [2025-04-30 10:46:33,017 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-04-30 10:46:33,067 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-04-30 10:46:33,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 48 places, 47 transitions, 108 flow [2025-04-30 10:46:33,116 INFO L116 PetriNetUnfolderBase]: 6/45 cut-off events. [2025-04-30 10:46:33,118 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-30 10:46:33,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54 conditions, 45 events. 6/45 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 65 event pairs, 0 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2025-04-30 10:46:33,119 INFO L82 GeneralOperation]: Start removeDead. Operand has 48 places, 47 transitions, 108 flow [2025-04-30 10:46:33,121 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 44 transitions, 100 flow [2025-04-30 10:46:33,129 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-30 10:46:33,136 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@a3766fd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-30 10:46:33,136 INFO L341 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2025-04-30 10:46:33,144 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-30 10:46:33,144 INFO L116 PetriNetUnfolderBase]: 1/14 cut-off events. [2025-04-30 10:46:33,144 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-30 10:46:33,144 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-30 10:46:33,145 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:46:33,145 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-04-30 10:46:33,151 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:46:33,151 INFO L85 PathProgramCache]: Analyzing trace with hash 2100677542, now seen corresponding path program 1 times [2025-04-30 10:46:33,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-04-30 10:46:33,158 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1353386338] [2025-04-30 10:46:33,158 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-30 10:46:33,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:46:33,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-30 10:46:33,160 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-30 10:46:33,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-04-30 10:46:33,222 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-04-30 10:46:33,232 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-04-30 10:46:33,232 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:46:33,232 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:46:33,234 INFO L256 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-04-30 10:46:33,237 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-30 10:46:33,319 INFO L325 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2025-04-30 10:46:33,321 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2025-04-30 10:46:33,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:46:33,386 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-04-30 10:46:33,388 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-04-30 10:46:33,389 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353386338] [2025-04-30 10:46:33,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353386338] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-30 10:46:33,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-30 10:46:33,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-04-30 10:46:33,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433773962] [2025-04-30 10:46:33,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-30 10:46:33,398 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-30 10:46:33,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-04-30 10:46:33,417 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-30 10:46:33,417 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-04-30 10:46:33,475 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 47 [2025-04-30 10:46:33,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 44 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:46:33,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-30 10:46:33,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 47 [2025-04-30 10:46:33,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-30 10:46:33,536 INFO L116 PetriNetUnfolderBase]: 9/58 cut-off events. [2025-04-30 10:46:33,536 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-30 10:46:33,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97 conditions, 58 events. 9/58 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 140 event pairs, 2 based on Foata normal form. 4/52 useless extension candidates. Maximal degree in co-relation 76. Up to 21 conditions per place. [2025-04-30 10:46:33,537 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 16 selfloop transitions, 3 changer transitions 0/39 dead transitions. [2025-04-30 10:46:33,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 39 transitions, 128 flow [2025-04-30 10:46:33,538 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-30 10:46:33,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-30 10:46:33,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 112 transitions. [2025-04-30 10:46:33,546 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5957446808510638 [2025-04-30 10:46:33,547 INFO L175 Difference]: Start difference. First operand has 45 places, 44 transitions, 100 flow. Second operand 4 states and 112 transitions. [2025-04-30 10:46:33,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 39 transitions, 128 flow [2025-04-30 10:46:33,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 39 transitions, 120 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-04-30 10:46:33,551 INFO L231 Difference]: Finished difference. Result has 41 places, 38 transitions, 86 flow [2025-04-30 10:46:33,552 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=86, PETRI_PLACES=41, PETRI_TRANSITIONS=38} [2025-04-30 10:46:33,554 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, -4 predicate places. [2025-04-30 10:46:33,554 INFO L485 AbstractCegarLoop]: Abstraction has has 41 places, 38 transitions, 86 flow [2025-04-30 10:46:33,554 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:46:33,554 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-30 10:46:33,555 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:46:33,561 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-04-30 10:46:33,755 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:46:33,755 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-04-30 10:46:33,756 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:46:33,756 INFO L85 PathProgramCache]: Analyzing trace with hash 696494632, now seen corresponding path program 1 times [2025-04-30 10:46:33,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-04-30 10:46:33,756 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [926248289] [2025-04-30 10:46:33,756 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-30 10:46:33,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:46:33,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-30 10:46:33,758 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-30 10:46:33,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-04-30 10:46:33,810 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-04-30 10:46:33,822 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-04-30 10:46:33,822 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:46:33,822 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:46:33,823 INFO L256 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-04-30 10:46:33,826 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-30 10:46:33,868 INFO L189 IndexEqualityManager]: detected not equals via solver [2025-04-30 10:46:33,869 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-04-30 10:46:33,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:46:33,917 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-04-30 10:46:33,917 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-04-30 10:46:33,918 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926248289] [2025-04-30 10:46:33,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926248289] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-30 10:46:33,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-30 10:46:33,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-30 10:46:33,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644877496] [2025-04-30 10:46:33,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-30 10:46:33,918 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-30 10:46:33,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-04-30 10:46:33,919 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-30 10:46:33,919 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-04-30 10:46:33,984 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 47 [2025-04-30 10:46:33,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 38 transitions, 86 flow. Second operand has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:46:33,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-30 10:46:33,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 47 [2025-04-30 10:46:33,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-30 10:46:34,083 INFO L116 PetriNetUnfolderBase]: 17/84 cut-off events. [2025-04-30 10:46:34,084 INFO L117 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2025-04-30 10:46:34,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 84 events. 17/84 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 208 event pairs, 7 based on Foata normal form. 2/72 useless extension candidates. Maximal degree in co-relation 60. Up to 40 conditions per place. [2025-04-30 10:46:34,084 INFO L140 encePairwiseOnDemand]: 41/47 looper letters, 22 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2025-04-30 10:46:34,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 43 transitions, 150 flow [2025-04-30 10:46:34,086 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-30 10:46:34,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-30 10:46:34,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 112 transitions. [2025-04-30 10:46:34,087 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5957446808510638 [2025-04-30 10:46:34,087 INFO L175 Difference]: Start difference. First operand has 41 places, 38 transitions, 86 flow. Second operand 4 states and 112 transitions. [2025-04-30 10:46:34,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 43 transitions, 150 flow [2025-04-30 10:46:34,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 43 transitions, 142 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-04-30 10:46:34,088 INFO L231 Difference]: Finished difference. Result has 42 places, 40 transitions, 103 flow [2025-04-30 10:46:34,089 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=103, PETRI_PLACES=42, PETRI_TRANSITIONS=40} [2025-04-30 10:46:34,089 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, -3 predicate places. [2025-04-30 10:46:34,089 INFO L485 AbstractCegarLoop]: Abstraction has has 42 places, 40 transitions, 103 flow [2025-04-30 10:46:34,089 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:46:34,089 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-30 10:46:34,089 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:46:34,099 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-04-30 10:46:34,290 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:46:34,291 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-04-30 10:46:34,291 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:46:34,291 INFO L85 PathProgramCache]: Analyzing trace with hash 116497384, now seen corresponding path program 1 times [2025-04-30 10:46:34,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-04-30 10:46:34,291 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [871487660] [2025-04-30 10:46:34,291 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-30 10:46:34,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:46:34,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-30 10:46:34,294 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-30 10:46:34,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-04-30 10:46:34,353 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-04-30 10:46:34,366 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-04-30 10:46:34,366 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:46:34,366 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:46:34,367 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-04-30 10:46:34,369 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-30 10:46:34,374 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2025-04-30 10:46:34,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:46:34,398 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-04-30 10:46:34,398 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-04-30 10:46:34,398 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871487660] [2025-04-30 10:46:34,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871487660] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-30 10:46:34,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-30 10:46:34,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-30 10:46:34,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054129373] [2025-04-30 10:46:34,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-30 10:46:34,399 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-30 10:46:34,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-04-30 10:46:34,400 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-30 10:46:34,400 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-04-30 10:46:34,440 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 47 [2025-04-30 10:46:34,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 103 flow. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:46:34,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-30 10:46:34,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 47 [2025-04-30 10:46:34,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-30 10:46:34,508 INFO L116 PetriNetUnfolderBase]: 15/77 cut-off events. [2025-04-30 10:46:34,510 INFO L117 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2025-04-30 10:46:34,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 77 events. 15/77 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 176 event pairs, 1 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 49. Up to 20 conditions per place. [2025-04-30 10:46:34,511 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 19 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2025-04-30 10:46:34,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 40 transitions, 149 flow [2025-04-30 10:46:34,513 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-30 10:46:34,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-30 10:46:34,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 107 transitions. [2025-04-30 10:46:34,513 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5691489361702128 [2025-04-30 10:46:34,514 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 103 flow. Second operand 4 states and 107 transitions. [2025-04-30 10:46:34,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 40 transitions, 149 flow [2025-04-30 10:46:34,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 40 transitions, 144 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-04-30 10:46:34,516 INFO L231 Difference]: Finished difference. Result has 41 places, 38 transitions, 102 flow [2025-04-30 10:46:34,517 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=102, PETRI_PLACES=41, PETRI_TRANSITIONS=38} [2025-04-30 10:46:34,518 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, -4 predicate places. [2025-04-30 10:46:34,518 INFO L485 AbstractCegarLoop]: Abstraction has has 41 places, 38 transitions, 102 flow [2025-04-30 10:46:34,518 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:46:34,518 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-30 10:46:34,518 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:46:34,524 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-04-30 10:46:34,718 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:46:34,719 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-04-30 10:46:34,719 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:46:34,719 INFO L85 PathProgramCache]: Analyzing trace with hash -683548118, now seen corresponding path program 1 times [2025-04-30 10:46:34,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-04-30 10:46:34,719 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1197868420] [2025-04-30 10:46:34,719 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-30 10:46:34,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:46:34,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-30 10:46:34,723 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-30 10:46:34,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-04-30 10:46:34,770 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-04-30 10:46:34,781 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-04-30 10:46:34,781 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:46:34,781 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:46:34,782 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-04-30 10:46:34,784 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-30 10:46:34,792 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-04-30 10:46:34,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:46:34,854 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-04-30 10:46:34,854 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-04-30 10:46:34,854 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197868420] [2025-04-30 10:46:34,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197868420] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-30 10:46:34,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-30 10:46:34,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-30 10:46:34,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568056873] [2025-04-30 10:46:34,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-30 10:46:34,855 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-30 10:46:34,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-04-30 10:46:34,855 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-30 10:46:34,856 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-04-30 10:46:34,891 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 47 [2025-04-30 10:46:34,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 38 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:46:34,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-30 10:46:34,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 47 [2025-04-30 10:46:34,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-30 10:46:34,957 INFO L116 PetriNetUnfolderBase]: 14/66 cut-off events. [2025-04-30 10:46:34,957 INFO L117 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2025-04-30 10:46:34,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 66 events. 14/66 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 136 event pairs, 4 based on Foata normal form. 2/62 useless extension candidates. Maximal degree in co-relation 49. Up to 31 conditions per place. [2025-04-30 10:46:34,958 INFO L140 encePairwiseOnDemand]: 41/47 looper letters, 20 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2025-04-30 10:46:34,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 40 transitions, 154 flow [2025-04-30 10:46:34,959 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-30 10:46:34,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-30 10:46:34,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 114 transitions. [2025-04-30 10:46:34,960 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.6063829787234043 [2025-04-30 10:46:34,960 INFO L175 Difference]: Start difference. First operand has 41 places, 38 transitions, 102 flow. Second operand 4 states and 114 transitions. [2025-04-30 10:46:34,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 40 transitions, 154 flow [2025-04-30 10:46:34,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 40 transitions, 146 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-04-30 10:46:34,961 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 105 flow [2025-04-30 10:46:34,961 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=105, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2025-04-30 10:46:34,962 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, -4 predicate places. [2025-04-30 10:46:34,962 INFO L485 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 105 flow [2025-04-30 10:46:34,962 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:46:34,962 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-30 10:46:34,962 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:46:34,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-04-30 10:46:35,165 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:46:35,165 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-04-30 10:46:35,166 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:46:35,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1034755921, now seen corresponding path program 1 times [2025-04-30 10:46:35,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-04-30 10:46:35,166 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1529453108] [2025-04-30 10:46:35,166 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-30 10:46:35,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:46:35,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-30 10:46:35,170 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-30 10:46:35,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-04-30 10:46:35,216 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-04-30 10:46:35,230 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-04-30 10:46:35,230 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:46:35,230 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:46:35,232 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-04-30 10:46:35,234 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-30 10:46:35,260 INFO L325 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2025-04-30 10:46:35,260 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2025-04-30 10:46:35,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:46:35,469 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-30 10:46:35,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:46:35,619 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-04-30 10:46:35,619 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529453108] [2025-04-30 10:46:35,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529453108] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-30 10:46:35,619 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-04-30 10:46:35,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2025-04-30 10:46:35,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351249870] [2025-04-30 10:46:35,619 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-04-30 10:46:35,620 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-04-30 10:46:35,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-04-30 10:46:35,620 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-04-30 10:46:35,620 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2025-04-30 10:46:35,882 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 47 [2025-04-30 10:46:35,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 105 flow. Second operand has 10 states, 10 states have (on average 23.4) internal successors, (234), 10 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:46:35,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-30 10:46:35,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 47 [2025-04-30 10:46:35,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-30 10:46:36,207 INFO L116 PetriNetUnfolderBase]: 27/119 cut-off events. [2025-04-30 10:46:36,208 INFO L117 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2025-04-30 10:46:36,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 235 conditions, 119 events. 27/119 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 214 event pairs, 2 based on Foata normal form. 12/126 useless extension candidates. Maximal degree in co-relation 81. Up to 27 conditions per place. [2025-04-30 10:46:36,209 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 26 selfloop transitions, 13 changer transitions 0/53 dead transitions. [2025-04-30 10:46:36,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 53 transitions, 221 flow [2025-04-30 10:46:36,210 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-04-30 10:46:36,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-04-30 10:46:36,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 234 transitions. [2025-04-30 10:46:36,213 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5531914893617021 [2025-04-30 10:46:36,214 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 105 flow. Second operand 9 states and 234 transitions. [2025-04-30 10:46:36,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 53 transitions, 221 flow [2025-04-30 10:46:36,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 213 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-04-30 10:46:36,216 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 148 flow [2025-04-30 10:46:36,216 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=148, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2025-04-30 10:46:36,217 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, 1 predicate places. [2025-04-30 10:46:36,217 INFO L485 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 148 flow [2025-04-30 10:46:36,218 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 23.4) internal successors, (234), 10 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:46:36,218 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-30 10:46:36,218 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:46:36,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-04-30 10:46:36,421 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:46:36,421 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-04-30 10:46:36,421 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:46:36,422 INFO L85 PathProgramCache]: Analyzing trace with hash -2004768693, now seen corresponding path program 1 times [2025-04-30 10:46:36,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-04-30 10:46:36,422 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [57302865] [2025-04-30 10:46:36,422 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-30 10:46:36,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:46:36,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-30 10:46:36,424 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-30 10:46:36,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-04-30 10:46:36,463 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-04-30 10:46:36,471 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-04-30 10:46:36,471 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:46:36,471 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:46:36,472 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-04-30 10:46:36,473 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-30 10:46:36,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:46:36,484 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-04-30 10:46:36,484 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-04-30 10:46:36,484 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57302865] [2025-04-30 10:46:36,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57302865] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-30 10:46:36,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-30 10:46:36,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-30 10:46:36,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754775986] [2025-04-30 10:46:36,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-30 10:46:36,484 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-30 10:46:36,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-04-30 10:46:36,485 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-30 10:46:36,485 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-30 10:46:36,493 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 47 [2025-04-30 10:46:36,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:46:36,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-30 10:46:36,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 47 [2025-04-30 10:46:36,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-30 10:46:36,540 INFO L116 PetriNetUnfolderBase]: 21/109 cut-off events. [2025-04-30 10:46:36,541 INFO L117 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2025-04-30 10:46:36,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239 conditions, 109 events. 21/109 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 208 event pairs, 11 based on Foata normal form. 1/106 useless extension candidates. Maximal degree in co-relation 88. Up to 51 conditions per place. [2025-04-30 10:46:36,541 INFO L140 encePairwiseOnDemand]: 45/47 looper letters, 24 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2025-04-30 10:46:36,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 41 transitions, 198 flow [2025-04-30 10:46:36,542 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-30 10:46:36,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-30 10:46:36,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 89 transitions. [2025-04-30 10:46:36,542 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.6312056737588653 [2025-04-30 10:46:36,542 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 148 flow. Second operand 3 states and 89 transitions. [2025-04-30 10:46:36,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 41 transitions, 198 flow [2025-04-30 10:46:36,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 41 transitions, 175 flow, removed 7 selfloop flow, removed 4 redundant places. [2025-04-30 10:46:36,544 INFO L231 Difference]: Finished difference. Result has 44 places, 40 transitions, 125 flow [2025-04-30 10:46:36,544 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=125, PETRI_PLACES=44, PETRI_TRANSITIONS=40} [2025-04-30 10:46:36,544 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, -1 predicate places. [2025-04-30 10:46:36,544 INFO L485 AbstractCegarLoop]: Abstraction has has 44 places, 40 transitions, 125 flow [2025-04-30 10:46:36,544 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:46:36,544 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-30 10:46:36,544 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:46:36,555 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-04-30 10:46:36,745 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:46:36,745 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-04-30 10:46:36,745 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:46:36,745 INFO L85 PathProgramCache]: Analyzing trace with hash 2031981297, now seen corresponding path program 1 times [2025-04-30 10:46:36,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-04-30 10:46:36,746 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [184053932] [2025-04-30 10:46:36,746 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-30 10:46:36,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:46:36,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-30 10:46:36,748 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-30 10:46:36,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-04-30 10:46:36,794 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-04-30 10:46:36,804 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-04-30 10:46:36,804 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:46:36,804 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:46:36,805 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-04-30 10:46:36,806 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-30 10:46:36,813 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-04-30 10:46:36,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:46:36,916 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-30 10:46:36,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:46:36,994 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-04-30 10:46:36,994 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184053932] [2025-04-30 10:46:36,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184053932] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-30 10:46:36,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-04-30 10:46:36,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2025-04-30 10:46:36,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601544006] [2025-04-30 10:46:36,995 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-04-30 10:46:36,995 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-04-30 10:46:36,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-04-30 10:46:36,995 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-04-30 10:46:36,995 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-04-30 10:46:37,146 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 47 [2025-04-30 10:46:37,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 40 transitions, 125 flow. Second operand has 8 states, 8 states have (on average 23.625) internal successors, (189), 8 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:46:37,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-30 10:46:37,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 47 [2025-04-30 10:46:37,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-30 10:46:37,318 INFO L116 PetriNetUnfolderBase]: 26/115 cut-off events. [2025-04-30 10:46:37,318 INFO L117 PetriNetUnfolderBase]: For 44/44 co-relation queries the response was YES. [2025-04-30 10:46:37,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 235 conditions, 115 events. 26/115 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 190 event pairs, 4 based on Foata normal form. 6/116 useless extension candidates. Maximal degree in co-relation 213. Up to 30 conditions per place. [2025-04-30 10:46:37,319 INFO L140 encePairwiseOnDemand]: 41/47 looper letters, 27 selfloop transitions, 11 changer transitions 0/52 dead transitions. [2025-04-30 10:46:37,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 52 transitions, 225 flow [2025-04-30 10:46:37,319 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-04-30 10:46:37,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-04-30 10:46:37,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2025-04-30 10:46:37,320 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2025-04-30 10:46:37,320 INFO L175 Difference]: Start difference. First operand has 44 places, 40 transitions, 125 flow. Second operand 7 states and 188 transitions. [2025-04-30 10:46:37,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 52 transitions, 225 flow [2025-04-30 10:46:37,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 52 transitions, 224 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-04-30 10:46:37,321 INFO L231 Difference]: Finished difference. Result has 53 places, 41 transitions, 174 flow [2025-04-30 10:46:37,321 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=174, PETRI_PLACES=53, PETRI_TRANSITIONS=41} [2025-04-30 10:46:37,322 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, 8 predicate places. [2025-04-30 10:46:37,322 INFO L485 AbstractCegarLoop]: Abstraction has has 53 places, 41 transitions, 174 flow [2025-04-30 10:46:37,322 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 23.625) internal successors, (189), 8 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:46:37,322 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-30 10:46:37,322 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:46:37,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-04-30 10:46:37,522 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:46:37,523 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-04-30 10:46:37,523 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:46:37,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1448504088, now seen corresponding path program 1 times [2025-04-30 10:46:37,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-04-30 10:46:37,523 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1964382942] [2025-04-30 10:46:37,523 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-30 10:46:37,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:46:37,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-30 10:46:37,525 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-30 10:46:37,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-04-30 10:46:37,564 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-04-30 10:46:37,576 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-04-30 10:46:37,576 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:46:37,576 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:46:37,577 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-04-30 10:46:37,578 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-30 10:46:37,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:46:37,606 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-04-30 10:46:37,606 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-04-30 10:46:37,607 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964382942] [2025-04-30 10:46:37,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964382942] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-30 10:46:37,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-30 10:46:37,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-04-30 10:46:37,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838454758] [2025-04-30 10:46:37,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-30 10:46:37,607 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-30 10:46:37,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-04-30 10:46:37,607 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-30 10:46:37,607 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-04-30 10:46:37,619 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 47 [2025-04-30 10:46:37,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 41 transitions, 174 flow. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:46:37,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-30 10:46:37,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 47 [2025-04-30 10:46:37,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-30 10:46:37,671 INFO L116 PetriNetUnfolderBase]: 20/108 cut-off events. [2025-04-30 10:46:37,672 INFO L117 PetriNetUnfolderBase]: For 148/148 co-relation queries the response was YES. [2025-04-30 10:46:37,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271 conditions, 108 events. 20/108 cut-off events. For 148/148 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 182 event pairs, 11 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 243. Up to 51 conditions per place. [2025-04-30 10:46:37,672 INFO L140 encePairwiseOnDemand]: 43/47 looper letters, 24 selfloop transitions, 3 changer transitions 0/41 dead transitions. [2025-04-30 10:46:37,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 41 transitions, 228 flow [2025-04-30 10:46:37,673 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-30 10:46:37,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-30 10:46:37,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2025-04-30 10:46:37,673 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5425531914893617 [2025-04-30 10:46:37,673 INFO L175 Difference]: Start difference. First operand has 53 places, 41 transitions, 174 flow. Second operand 4 states and 102 transitions. [2025-04-30 10:46:37,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 41 transitions, 228 flow [2025-04-30 10:46:37,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 41 transitions, 214 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-04-30 10:46:37,674 INFO L231 Difference]: Finished difference. Result has 51 places, 40 transitions, 164 flow [2025-04-30 10:46:37,675 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=164, PETRI_PLACES=51, PETRI_TRANSITIONS=40} [2025-04-30 10:46:37,675 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, 6 predicate places. [2025-04-30 10:46:37,675 INFO L485 AbstractCegarLoop]: Abstraction has has 51 places, 40 transitions, 164 flow [2025-04-30 10:46:37,675 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:46:37,675 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-30 10:46:37,675 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:46:37,682 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-04-30 10:46:37,875 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:46:37,876 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-04-30 10:46:37,876 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:46:37,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1989818688, now seen corresponding path program 1 times [2025-04-30 10:46:37,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-04-30 10:46:37,876 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1282094820] [2025-04-30 10:46:37,876 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-30 10:46:37,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:46:37,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-30 10:46:37,879 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-30 10:46:37,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-04-30 10:46:37,918 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-04-30 10:46:37,936 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-04-30 10:46:37,936 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:46:37,936 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:46:37,938 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-04-30 10:46:37,939 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-30 10:46:38,000 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2025-04-30 10:46:38,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:46:38,007 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-04-30 10:46:38,008 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-04-30 10:46:38,008 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282094820] [2025-04-30 10:46:38,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282094820] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-30 10:46:38,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-30 10:46:38,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-04-30 10:46:38,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537400471] [2025-04-30 10:46:38,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-30 10:46:38,008 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-30 10:46:38,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-04-30 10:46:38,008 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-30 10:46:38,008 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-04-30 10:46:38,045 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 47 [2025-04-30 10:46:38,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 40 transitions, 164 flow. Second operand has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:46:38,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-30 10:46:38,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 47 [2025-04-30 10:46:38,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-30 10:46:38,124 INFO L116 PetriNetUnfolderBase]: 21/112 cut-off events. [2025-04-30 10:46:38,124 INFO L117 PetriNetUnfolderBase]: For 68/68 co-relation queries the response was YES. [2025-04-30 10:46:38,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 270 conditions, 112 events. 21/112 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 187 event pairs, 12 based on Foata normal form. 2/111 useless extension candidates. Maximal degree in co-relation 240. Up to 52 conditions per place. [2025-04-30 10:46:38,127 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 24 selfloop transitions, 5 changer transitions 0/44 dead transitions. [2025-04-30 10:46:38,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 44 transitions, 224 flow [2025-04-30 10:46:38,127 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-04-30 10:46:38,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-04-30 10:46:38,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 164 transitions. [2025-04-30 10:46:38,129 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5815602836879432 [2025-04-30 10:46:38,129 INFO L175 Difference]: Start difference. First operand has 51 places, 40 transitions, 164 flow. Second operand 6 states and 164 transitions. [2025-04-30 10:46:38,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 44 transitions, 224 flow [2025-04-30 10:46:38,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 44 transitions, 218 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-04-30 10:46:38,130 INFO L231 Difference]: Finished difference. Result has 54 places, 41 transitions, 170 flow [2025-04-30 10:46:38,130 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=170, PETRI_PLACES=54, PETRI_TRANSITIONS=41} [2025-04-30 10:46:38,131 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, 9 predicate places. [2025-04-30 10:46:38,131 INFO L485 AbstractCegarLoop]: Abstraction has has 54 places, 41 transitions, 170 flow [2025-04-30 10:46:38,131 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:46:38,131 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-30 10:46:38,131 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:46:38,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-04-30 10:46:38,337 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:46:38,337 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-04-30 10:46:38,337 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:46:38,337 INFO L85 PathProgramCache]: Analyzing trace with hash -226414099, now seen corresponding path program 1 times [2025-04-30 10:46:38,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-04-30 10:46:38,338 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1608608653] [2025-04-30 10:46:38,338 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-30 10:46:38,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:46:38,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-30 10:46:38,339 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-30 10:46:38,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-04-30 10:46:38,379 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-04-30 10:46:38,394 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-04-30 10:46:38,394 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:46:38,395 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:46:38,396 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-04-30 10:46:38,398 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-30 10:46:38,408 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-04-30 10:46:38,643 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2025-04-30 10:46:38,651 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:46:38,651 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-30 10:46:38,846 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:46:38,847 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-04-30 10:46:38,847 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608608653] [2025-04-30 10:46:38,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608608653] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-30 10:46:38,847 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-04-30 10:46:38,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2025-04-30 10:46:38,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359776690] [2025-04-30 10:46:38,847 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-04-30 10:46:38,847 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-04-30 10:46:38,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-04-30 10:46:38,848 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-04-30 10:46:38,848 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2025-04-30 10:46:39,181 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 47 [2025-04-30 10:46:39,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 41 transitions, 170 flow. Second operand has 14 states, 14 states have (on average 22.571428571428573) internal successors, (316), 14 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:46:39,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-30 10:46:39,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 47 [2025-04-30 10:46:39,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-30 10:46:39,486 INFO L116 PetriNetUnfolderBase]: 23/112 cut-off events. [2025-04-30 10:46:39,486 INFO L117 PetriNetUnfolderBase]: For 87/87 co-relation queries the response was YES. [2025-04-30 10:46:39,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 292 conditions, 112 events. 23/112 cut-off events. For 87/87 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 181 event pairs, 6 based on Foata normal form. 2/111 useless extension candidates. Maximal degree in co-relation 262. Up to 32 conditions per place. [2025-04-30 10:46:39,487 INFO L140 encePairwiseOnDemand]: 40/47 looper letters, 28 selfloop transitions, 11 changer transitions 0/51 dead transitions. [2025-04-30 10:46:39,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 51 transitions, 270 flow [2025-04-30 10:46:39,487 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-04-30 10:46:39,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-04-30 10:46:39,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 237 transitions. [2025-04-30 10:46:39,488 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5042553191489362 [2025-04-30 10:46:39,488 INFO L175 Difference]: Start difference. First operand has 54 places, 41 transitions, 170 flow. Second operand 10 states and 237 transitions. [2025-04-30 10:46:39,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 51 transitions, 270 flow [2025-04-30 10:46:39,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 51 transitions, 267 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-04-30 10:46:39,489 INFO L231 Difference]: Finished difference. Result has 62 places, 41 transitions, 189 flow [2025-04-30 10:46:39,489 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=189, PETRI_PLACES=62, PETRI_TRANSITIONS=41} [2025-04-30 10:46:39,490 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, 17 predicate places. [2025-04-30 10:46:39,490 INFO L485 AbstractCegarLoop]: Abstraction has has 62 places, 41 transitions, 189 flow [2025-04-30 10:46:39,490 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 22.571428571428573) internal successors, (316), 14 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:46:39,490 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-30 10:46:39,490 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:46:39,496 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-04-30 10:46:39,690 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:46:39,691 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-04-30 10:46:39,691 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:46:39,691 INFO L85 PathProgramCache]: Analyzing trace with hash 119061700, now seen corresponding path program 2 times [2025-04-30 10:46:39,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-04-30 10:46:39,691 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1966986023] [2025-04-30 10:46:39,691 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-30 10:46:39,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:46:39,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-30 10:46:39,693 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-30 10:46:39,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-04-30 10:46:39,731 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 35 statements into 2 equivalence classes. [2025-04-30 10:46:39,752 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 35 of 35 statements. [2025-04-30 10:46:39,752 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-30 10:46:39,752 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:46:39,757 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-04-30 10:46:39,759 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-30 10:46:39,779 INFO L325 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2025-04-30 10:46:39,779 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2025-04-30 10:46:40,241 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:46:40,241 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-30 10:46:40,921 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:46:40,921 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-04-30 10:46:40,921 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966986023] [2025-04-30 10:46:40,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966986023] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-30 10:46:40,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-04-30 10:46:40,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 17 [2025-04-30 10:46:40,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120089289] [2025-04-30 10:46:40,921 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-04-30 10:46:40,922 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-04-30 10:46:40,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-04-30 10:46:40,922 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-04-30 10:46:40,922 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2025-04-30 10:46:41,689 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 47 [2025-04-30 10:46:41,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 41 transitions, 189 flow. Second operand has 19 states, 19 states have (on average 20.63157894736842) internal successors, (392), 19 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:46:41,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-30 10:46:41,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 47 [2025-04-30 10:46:41,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-30 10:46:43,839 INFO L116 PetriNetUnfolderBase]: 70/246 cut-off events. [2025-04-30 10:46:43,840 INFO L117 PetriNetUnfolderBase]: For 469/469 co-relation queries the response was YES. [2025-04-30 10:46:43,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 779 conditions, 246 events. 70/246 cut-off events. For 469/469 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 375 event pairs, 3 based on Foata normal form. 0/240 useless extension candidates. Maximal degree in co-relation 745. Up to 50 conditions per place. [2025-04-30 10:46:43,841 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 59 selfloop transitions, 28 changer transitions 0/97 dead transitions. [2025-04-30 10:46:43,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 97 transitions, 680 flow [2025-04-30 10:46:43,843 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-04-30 10:46:43,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-04-30 10:46:43,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 416 transitions. [2025-04-30 10:46:43,844 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.491725768321513 [2025-04-30 10:46:43,844 INFO L175 Difference]: Start difference. First operand has 62 places, 41 transitions, 189 flow. Second operand 18 states and 416 transitions. [2025-04-30 10:46:43,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 97 transitions, 680 flow [2025-04-30 10:46:43,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 97 transitions, 609 flow, removed 26 selfloop flow, removed 9 redundant places. [2025-04-30 10:46:43,847 INFO L231 Difference]: Finished difference. Result has 78 places, 60 transitions, 421 flow [2025-04-30 10:46:43,847 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=421, PETRI_PLACES=78, PETRI_TRANSITIONS=60} [2025-04-30 10:46:43,847 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, 33 predicate places. [2025-04-30 10:46:43,847 INFO L485 AbstractCegarLoop]: Abstraction has has 78 places, 60 transitions, 421 flow [2025-04-30 10:46:43,847 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 20.63157894736842) internal successors, (392), 19 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:46:43,847 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-30 10:46:43,848 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:46:43,855 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-04-30 10:46:44,048 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:46:44,048 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-04-30 10:46:44,048 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:46:44,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1545814586, now seen corresponding path program 2 times [2025-04-30 10:46:44,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-04-30 10:46:44,049 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [237808093] [2025-04-30 10:46:44,049 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-30 10:46:44,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:46:44,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-30 10:46:44,052 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-30 10:46:44,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-04-30 10:46:44,094 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-04-30 10:46:44,102 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 13 of 37 statements. [2025-04-30 10:46:44,103 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-04-30 10:46:44,103 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:46:44,104 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-04-30 10:46:44,105 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-30 10:46:44,121 INFO L325 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2025-04-30 10:46:44,121 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2025-04-30 10:46:44,394 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2025-04-30 10:46:44,394 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-30 10:46:44,708 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2025-04-30 10:46:44,708 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-04-30 10:46:44,708 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237808093] [2025-04-30 10:46:44,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237808093] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-30 10:46:44,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-04-30 10:46:44,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2025-04-30 10:46:44,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567015994] [2025-04-30 10:46:44,709 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-04-30 10:46:44,709 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-04-30 10:46:44,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-04-30 10:46:44,709 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-04-30 10:46:44,709 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2025-04-30 10:46:45,141 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 47 [2025-04-30 10:46:45,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 60 transitions, 421 flow. Second operand has 10 states, 10 states have (on average 22.8) internal successors, (228), 10 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:46:45,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-30 10:46:45,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 47 [2025-04-30 10:46:45,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-30 10:46:45,261 INFO L116 PetriNetUnfolderBase]: 62/229 cut-off events. [2025-04-30 10:46:45,261 INFO L117 PetriNetUnfolderBase]: For 806/806 co-relation queries the response was YES. [2025-04-30 10:46:45,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 778 conditions, 229 events. 62/229 cut-off events. For 806/806 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 329 event pairs, 2 based on Foata normal form. 12/240 useless extension candidates. Maximal degree in co-relation 738. Up to 95 conditions per place. [2025-04-30 10:46:45,262 INFO L140 encePairwiseOnDemand]: 40/47 looper letters, 24 selfloop transitions, 25 changer transitions 0/61 dead transitions. [2025-04-30 10:46:45,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 61 transitions, 500 flow [2025-04-30 10:46:45,263 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-04-30 10:46:45,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-04-30 10:46:45,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2025-04-30 10:46:45,264 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5141843971631206 [2025-04-30 10:46:45,264 INFO L175 Difference]: Start difference. First operand has 78 places, 60 transitions, 421 flow. Second operand 6 states and 145 transitions. [2025-04-30 10:46:45,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 61 transitions, 500 flow [2025-04-30 10:46:45,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 61 transitions, 472 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-04-30 10:46:45,267 INFO L231 Difference]: Finished difference. Result has 75 places, 58 transitions, 434 flow [2025-04-30 10:46:45,267 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=434, PETRI_PLACES=75, PETRI_TRANSITIONS=58} [2025-04-30 10:46:45,267 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, 30 predicate places. [2025-04-30 10:46:45,267 INFO L485 AbstractCegarLoop]: Abstraction has has 75 places, 58 transitions, 434 flow [2025-04-30 10:46:45,267 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 22.8) internal successors, (228), 10 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:46:45,267 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-30 10:46:45,268 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:46:45,274 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-04-30 10:46:45,472 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:46:45,472 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-04-30 10:46:45,472 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:46:45,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1930966962, now seen corresponding path program 2 times [2025-04-30 10:46:45,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-04-30 10:46:45,473 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [489929282] [2025-04-30 10:46:45,473 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-30 10:46:45,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:46:45,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-30 10:46:45,475 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-30 10:46:45,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-04-30 10:46:45,515 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 38 statements into 2 equivalence classes. [2025-04-30 10:46:45,537 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 38 of 38 statements. [2025-04-30 10:46:45,537 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-30 10:46:45,537 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:46:45,540 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-04-30 10:46:45,543 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-30 10:46:45,555 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-04-30 10:46:45,852 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2025-04-30 10:46:45,865 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:46:45,865 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-30 10:46:46,087 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:46:46,087 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-04-30 10:46:46,087 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489929282] [2025-04-30 10:46:46,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489929282] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-30 10:46:46,087 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-04-30 10:46:46,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2025-04-30 10:46:46,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607753519] [2025-04-30 10:46:46,087 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-04-30 10:46:46,087 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-04-30 10:46:46,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-04-30 10:46:46,088 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-04-30 10:46:46,088 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2025-04-30 10:46:46,582 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 47 [2025-04-30 10:46:46,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 58 transitions, 434 flow. Second operand has 16 states, 16 states have (on average 22.5625) internal successors, (361), 16 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:46:46,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-30 10:46:46,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 47 [2025-04-30 10:46:46,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-30 10:46:46,880 INFO L116 PetriNetUnfolderBase]: 57/222 cut-off events. [2025-04-30 10:46:46,880 INFO L117 PetriNetUnfolderBase]: For 805/805 co-relation queries the response was YES. [2025-04-30 10:46:46,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 794 conditions, 222 events. 57/222 cut-off events. For 805/805 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 317 event pairs, 16 based on Foata normal form. 2/223 useless extension candidates. Maximal degree in co-relation 752. Up to 72 conditions per place. [2025-04-30 10:46:46,882 INFO L140 encePairwiseOnDemand]: 41/47 looper letters, 36 selfloop transitions, 17 changer transitions 0/69 dead transitions. [2025-04-30 10:46:46,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 69 transitions, 561 flow [2025-04-30 10:46:46,882 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-04-30 10:46:46,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-04-30 10:46:46,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 260 transitions. [2025-04-30 10:46:46,883 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5029013539651838 [2025-04-30 10:46:46,883 INFO L175 Difference]: Start difference. First operand has 75 places, 58 transitions, 434 flow. Second operand 11 states and 260 transitions. [2025-04-30 10:46:46,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 69 transitions, 561 flow [2025-04-30 10:46:46,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 69 transitions, 527 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-04-30 10:46:46,889 INFO L231 Difference]: Finished difference. Result has 82 places, 58 transitions, 431 flow [2025-04-30 10:46:46,889 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=389, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=431, PETRI_PLACES=82, PETRI_TRANSITIONS=58} [2025-04-30 10:46:46,890 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, 37 predicate places. [2025-04-30 10:46:46,890 INFO L485 AbstractCegarLoop]: Abstraction has has 82 places, 58 transitions, 431 flow [2025-04-30 10:46:46,890 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 22.5625) internal successors, (361), 16 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:46:46,890 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-30 10:46:46,891 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:46:46,898 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-04-30 10:46:47,091 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:46:47,091 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-04-30 10:46:47,092 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:46:47,092 INFO L85 PathProgramCache]: Analyzing trace with hash -628157729, now seen corresponding path program 3 times [2025-04-30 10:46:47,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-04-30 10:46:47,092 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [888670203] [2025-04-30 10:46:47,092 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-30 10:46:47,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:46:47,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-30 10:46:47,095 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-30 10:46:47,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-04-30 10:46:47,132 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 44 statements into 4 equivalence classes. [2025-04-30 10:46:47,159 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 44 of 44 statements. [2025-04-30 10:46:47,159 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-04-30 10:46:47,159 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:46:47,162 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-04-30 10:46:47,163 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-30 10:46:47,172 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-04-30 10:46:47,512 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2025-04-30 10:46:47,519 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:46:47,519 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-30 10:46:47,806 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:46:47,807 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-04-30 10:46:47,807 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888670203] [2025-04-30 10:46:47,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888670203] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-30 10:46:47,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-04-30 10:46:47,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2025-04-30 10:46:47,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647369030] [2025-04-30 10:46:47,807 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-04-30 10:46:47,807 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-04-30 10:46:47,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-04-30 10:46:47,807 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-04-30 10:46:47,808 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2025-04-30 10:46:48,429 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 47 [2025-04-30 10:46:48,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 58 transitions, 431 flow. Second operand has 18 states, 18 states have (on average 22.666666666666668) internal successors, (408), 18 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:46:48,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-30 10:46:48,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 47 [2025-04-30 10:46:48,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-30 10:46:48,921 INFO L116 PetriNetUnfolderBase]: 54/217 cut-off events. [2025-04-30 10:46:48,921 INFO L117 PetriNetUnfolderBase]: For 682/682 co-relation queries the response was YES. [2025-04-30 10:46:48,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 793 conditions, 217 events. 54/217 cut-off events. For 682/682 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 306 event pairs, 14 based on Foata normal form. 2/218 useless extension candidates. Maximal degree in co-relation 750. Up to 64 conditions per place. [2025-04-30 10:46:48,922 INFO L140 encePairwiseOnDemand]: 41/47 looper letters, 38 selfloop transitions, 18 changer transitions 0/72 dead transitions. [2025-04-30 10:46:48,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 72 transitions, 580 flow [2025-04-30 10:46:48,923 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-04-30 10:46:48,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-04-30 10:46:48,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 305 transitions. [2025-04-30 10:46:48,923 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.49918166939443537 [2025-04-30 10:46:48,923 INFO L175 Difference]: Start difference. First operand has 82 places, 58 transitions, 431 flow. Second operand 13 states and 305 transitions. [2025-04-30 10:46:48,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 72 transitions, 580 flow [2025-04-30 10:46:48,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 72 transitions, 542 flow, removed 0 selfloop flow, removed 9 redundant places. [2025-04-30 10:46:48,926 INFO L231 Difference]: Finished difference. Result has 86 places, 58 transitions, 429 flow [2025-04-30 10:46:48,926 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=385, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=429, PETRI_PLACES=86, PETRI_TRANSITIONS=58} [2025-04-30 10:46:48,927 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, 41 predicate places. [2025-04-30 10:46:48,927 INFO L485 AbstractCegarLoop]: Abstraction has has 86 places, 58 transitions, 429 flow [2025-04-30 10:46:48,927 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 22.666666666666668) internal successors, (408), 18 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:46:48,927 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-30 10:46:48,927 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:46:48,935 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-04-30 10:46:49,127 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:46:49,128 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-04-30 10:46:49,128 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:46:49,128 INFO L85 PathProgramCache]: Analyzing trace with hash -960558792, now seen corresponding path program 4 times [2025-04-30 10:46:49,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-04-30 10:46:49,128 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1531343008] [2025-04-30 10:46:49,128 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-30 10:46:49,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:46:49,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-30 10:46:49,130 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-30 10:46:49,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-04-30 10:46:49,170 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 50 statements into 2 equivalence classes. [2025-04-30 10:46:49,206 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 50 of 50 statements. [2025-04-30 10:46:49,206 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-30 10:46:49,206 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:46:49,209 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-04-30 10:46:49,211 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-30 10:46:49,221 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-04-30 10:46:49,604 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2025-04-30 10:46:49,612 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:46:49,612 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-30 10:46:49,968 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:46:49,968 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-04-30 10:46:49,968 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531343008] [2025-04-30 10:46:49,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531343008] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-30 10:46:49,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-04-30 10:46:49,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2025-04-30 10:46:49,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716581324] [2025-04-30 10:46:49,968 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-04-30 10:46:49,968 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-04-30 10:46:49,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-04-30 10:46:49,969 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-04-30 10:46:49,969 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2025-04-30 10:46:50,791 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 47 [2025-04-30 10:46:50,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 58 transitions, 429 flow. Second operand has 20 states, 20 states have (on average 22.7) internal successors, (454), 20 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:46:50,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-30 10:46:50,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 47 [2025-04-30 10:46:50,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-30 10:46:52,045 INFO L116 PetriNetUnfolderBase]: 48/217 cut-off events. [2025-04-30 10:46:52,046 INFO L117 PetriNetUnfolderBase]: For 731/731 co-relation queries the response was YES. [2025-04-30 10:46:52,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 800 conditions, 217 events. 48/217 cut-off events. For 731/731 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 299 event pairs, 4 based on Foata normal form. 6/222 useless extension candidates. Maximal degree in co-relation 756. Up to 40 conditions per place. [2025-04-30 10:46:52,047 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 50 selfloop transitions, 27 changer transitions 0/93 dead transitions. [2025-04-30 10:46:52,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 93 transitions, 729 flow [2025-04-30 10:46:52,047 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-04-30 10:46:52,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2025-04-30 10:46:52,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 560 transitions. [2025-04-30 10:46:52,050 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.49645390070921985 [2025-04-30 10:46:52,050 INFO L175 Difference]: Start difference. First operand has 86 places, 58 transitions, 429 flow. Second operand 24 states and 560 transitions. [2025-04-30 10:46:52,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 93 transitions, 729 flow [2025-04-30 10:46:52,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 93 transitions, 679 flow, removed 0 selfloop flow, removed 11 redundant places. [2025-04-30 10:46:52,054 INFO L231 Difference]: Finished difference. Result has 102 places, 63 transitions, 488 flow [2025-04-30 10:46:52,054 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=488, PETRI_PLACES=102, PETRI_TRANSITIONS=63} [2025-04-30 10:46:52,054 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, 57 predicate places. [2025-04-30 10:46:52,054 INFO L485 AbstractCegarLoop]: Abstraction has has 102 places, 63 transitions, 488 flow [2025-04-30 10:46:52,055 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 22.7) internal successors, (454), 20 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:46:52,055 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-30 10:46:52,055 INFO L206 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:46:52,062 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-04-30 10:46:52,255 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:46:52,255 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-04-30 10:46:52,256 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:46:52,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1087122109, now seen corresponding path program 5 times [2025-04-30 10:46:52,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-04-30 10:46:52,256 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [970282151] [2025-04-30 10:46:52,256 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-30 10:46:52,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:46:52,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-30 10:46:52,259 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-30 10:46:52,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-04-30 10:46:52,301 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 56 statements into 6 equivalence classes. [2025-04-30 10:46:52,367 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 56 of 56 statements. [2025-04-30 10:46:52,367 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-04-30 10:46:52,367 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:46:52,371 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-04-30 10:46:52,373 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-30 10:46:52,381 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-04-30 10:46:52,863 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2025-04-30 10:46:52,870 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:46:52,871 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-30 10:46:53,293 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:46:53,294 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-04-30 10:46:53,294 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970282151] [2025-04-30 10:46:53,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970282151] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-30 10:46:53,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-04-30 10:46:53,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2025-04-30 10:46:53,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106401378] [2025-04-30 10:46:53,294 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-04-30 10:46:53,294 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-04-30 10:46:53,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-04-30 10:46:53,294 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-04-30 10:46:53,295 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2025-04-30 10:46:54,249 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 47 [2025-04-30 10:46:54,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 63 transitions, 488 flow. Second operand has 22 states, 22 states have (on average 22.681818181818183) internal successors, (499), 22 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:46:54,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-30 10:46:54,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 47 [2025-04-30 10:46:54,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-30 10:46:55,793 INFO L116 PetriNetUnfolderBase]: 51/246 cut-off events. [2025-04-30 10:46:55,794 INFO L117 PetriNetUnfolderBase]: For 1108/1108 co-relation queries the response was YES. [2025-04-30 10:46:55,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 958 conditions, 246 events. 51/246 cut-off events. For 1108/1108 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 342 event pairs, 4 based on Foata normal form. 6/251 useless extension candidates. Maximal degree in co-relation 910. Up to 45 conditions per place. [2025-04-30 10:46:55,795 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 55 selfloop transitions, 30 changer transitions 0/101 dead transitions. [2025-04-30 10:46:55,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 101 transitions, 840 flow [2025-04-30 10:46:55,795 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-04-30 10:46:55,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2025-04-30 10:46:55,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 648 transitions. [2025-04-30 10:46:55,796 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.49240121580547114 [2025-04-30 10:46:55,796 INFO L175 Difference]: Start difference. First operand has 102 places, 63 transitions, 488 flow. Second operand 28 states and 648 transitions. [2025-04-30 10:46:55,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 101 transitions, 840 flow [2025-04-30 10:46:55,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 101 transitions, 803 flow, removed 2 selfloop flow, removed 16 redundant places. [2025-04-30 10:46:55,801 INFO L231 Difference]: Finished difference. Result has 119 places, 67 transitions, 585 flow [2025-04-30 10:46:55,801 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=585, PETRI_PLACES=119, PETRI_TRANSITIONS=67} [2025-04-30 10:46:55,802 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, 74 predicate places. [2025-04-30 10:46:55,802 INFO L485 AbstractCegarLoop]: Abstraction has has 119 places, 67 transitions, 585 flow [2025-04-30 10:46:55,803 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 22.681818181818183) internal successors, (499), 22 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:46:55,803 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-30 10:46:55,803 INFO L206 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:46:55,811 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-04-30 10:46:56,003 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:46:56,003 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-04-30 10:46:56,006 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:46:56,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1467565216, now seen corresponding path program 3 times [2025-04-30 10:46:56,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-04-30 10:46:56,007 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [530083653] [2025-04-30 10:46:56,007 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-30 10:46:56,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:46:56,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-30 10:46:56,009 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-30 10:46:56,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-04-30 10:46:56,052 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 59 statements into 9 equivalence classes. [2025-04-30 10:46:56,063 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 17 of 59 statements. [2025-04-30 10:46:56,063 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-30 10:46:56,063 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:46:56,064 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-04-30 10:46:56,066 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-30 10:46:56,097 INFO L325 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2025-04-30 10:46:56,097 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2025-04-30 10:46:56,108 INFO L325 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-04-30 10:46:56,108 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2025-04-30 10:46:56,747 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-30 10:46:56,748 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2025-04-30 10:46:56,855 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2025-04-30 10:46:56,855 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-30 10:46:57,687 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2025-04-30 10:46:57,688 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-04-30 10:46:57,688 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530083653] [2025-04-30 10:46:57,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530083653] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-30 10:46:57,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-04-30 10:46:57,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2025-04-30 10:46:57,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743012853] [2025-04-30 10:46:57,688 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-04-30 10:46:57,688 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-04-30 10:46:57,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-04-30 10:46:57,688 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-04-30 10:46:57,688 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2025-04-30 10:46:58,423 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2025-04-30 10:46:58,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 67 transitions, 585 flow. Second operand has 14 states, 14 states have (on average 19.571428571428573) internal successors, (274), 14 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:46:58,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-30 10:46:58,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2025-04-30 10:46:58,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-30 10:46:58,962 INFO L116 PetriNetUnfolderBase]: 77/264 cut-off events. [2025-04-30 10:46:58,962 INFO L117 PetriNetUnfolderBase]: For 1286/1286 co-relation queries the response was YES. [2025-04-30 10:46:58,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1096 conditions, 264 events. 77/264 cut-off events. For 1286/1286 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 327 event pairs, 2 based on Foata normal form. 8/271 useless extension candidates. Maximal degree in co-relation 1040. Up to 146 conditions per place. [2025-04-30 10:46:58,964 INFO L140 encePairwiseOnDemand]: 40/47 looper letters, 33 selfloop transitions, 30 changer transitions 0/71 dead transitions. [2025-04-30 10:46:58,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 71 transitions, 699 flow [2025-04-30 10:46:58,965 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-04-30 10:46:58,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-04-30 10:46:58,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 151 transitions. [2025-04-30 10:46:58,965 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.45896656534954405 [2025-04-30 10:46:58,965 INFO L175 Difference]: Start difference. First operand has 119 places, 67 transitions, 585 flow. Second operand 7 states and 151 transitions. [2025-04-30 10:46:58,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 71 transitions, 699 flow [2025-04-30 10:46:58,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 71 transitions, 630 flow, removed 6 selfloop flow, removed 25 redundant places. [2025-04-30 10:46:58,970 INFO L231 Difference]: Finished difference. Result has 98 places, 65 transitions, 550 flow [2025-04-30 10:46:58,971 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=550, PETRI_PLACES=98, PETRI_TRANSITIONS=65} [2025-04-30 10:46:58,971 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, 53 predicate places. [2025-04-30 10:46:58,971 INFO L485 AbstractCegarLoop]: Abstraction has has 98 places, 65 transitions, 550 flow [2025-04-30 10:46:58,971 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 19.571428571428573) internal successors, (274), 14 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:46:58,971 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-30 10:46:58,971 INFO L206 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:46:58,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2025-04-30 10:46:59,172 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:46:59,172 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-04-30 10:46:59,173 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:46:59,173 INFO L85 PathProgramCache]: Analyzing trace with hash 843604886, now seen corresponding path program 6 times [2025-04-30 10:46:59,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-04-30 10:46:59,173 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [699564346] [2025-04-30 10:46:59,173 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-30 10:46:59,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:46:59,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-30 10:46:59,175 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-30 10:46:59,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-04-30 10:46:59,219 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 62 statements into 7 equivalence classes. [2025-04-30 10:46:59,386 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 62 of 62 statements. [2025-04-30 10:46:59,386 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-04-30 10:46:59,386 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:46:59,389 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-04-30 10:46:59,390 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-30 10:46:59,398 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-04-30 10:46:59,939 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2025-04-30 10:46:59,948 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:46:59,948 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-30 10:47:00,528 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:47:00,529 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-04-30 10:47:00,529 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699564346] [2025-04-30 10:47:00,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699564346] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-30 10:47:00,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-04-30 10:47:00,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2025-04-30 10:47:00,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586621240] [2025-04-30 10:47:00,529 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-04-30 10:47:00,529 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-04-30 10:47:00,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-04-30 10:47:00,529 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-04-30 10:47:00,530 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2025-04-30 10:47:01,723 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 47 [2025-04-30 10:47:01,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 65 transitions, 550 flow. Second operand has 24 states, 24 states have (on average 22.708333333333332) internal successors, (545), 24 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:47:01,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-30 10:47:01,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 47 [2025-04-30 10:47:01,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-30 10:47:04,094 INFO L116 PetriNetUnfolderBase]: 54/263 cut-off events. [2025-04-30 10:47:04,094 INFO L117 PetriNetUnfolderBase]: For 1509/1509 co-relation queries the response was YES. [2025-04-30 10:47:04,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1082 conditions, 263 events. 54/263 cut-off events. For 1509/1509 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 318 event pairs, 4 based on Foata normal form. 6/268 useless extension candidates. Maximal degree in co-relation 1028. Up to 50 conditions per place. [2025-04-30 10:47:04,095 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 60 selfloop transitions, 33 changer transitions 0/107 dead transitions. [2025-04-30 10:47:04,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 107 transitions, 963 flow [2025-04-30 10:47:04,097 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-04-30 10:47:04,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2025-04-30 10:47:04,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 736 transitions. [2025-04-30 10:47:04,098 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.48936170212765956 [2025-04-30 10:47:04,098 INFO L175 Difference]: Start difference. First operand has 98 places, 65 transitions, 550 flow. Second operand 32 states and 736 transitions. [2025-04-30 10:47:04,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 107 transitions, 963 flow [2025-04-30 10:47:04,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 107 transitions, 925 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-04-30 10:47:04,107 INFO L231 Difference]: Finished difference. Result has 130 places, 69 transitions, 674 flow [2025-04-30 10:47:04,108 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=503, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=674, PETRI_PLACES=130, PETRI_TRANSITIONS=69} [2025-04-30 10:47:04,108 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, 85 predicate places. [2025-04-30 10:47:04,108 INFO L485 AbstractCegarLoop]: Abstraction has has 130 places, 69 transitions, 674 flow [2025-04-30 10:47:04,108 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 22.708333333333332) internal successors, (545), 24 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:47:04,108 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-30 10:47:04,108 INFO L206 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:47:04,117 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-04-30 10:47:04,309 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:47:04,309 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-04-30 10:47:04,310 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:47:04,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1256379823, now seen corresponding path program 7 times [2025-04-30 10:47:04,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-04-30 10:47:04,310 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1567109519] [2025-04-30 10:47:04,310 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-30 10:47:04,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:47:04,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-30 10:47:04,312 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-30 10:47:04,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-04-30 10:47:04,354 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 68 statements into 1 equivalence classes. [2025-04-30 10:47:05,133 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 68 of 68 statements. [2025-04-30 10:47:05,133 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:47:05,133 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-30 10:47:05,133 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-30 10:47:05,159 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 68 statements into 1 equivalence classes. [2025-04-30 10:47:05,528 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 68 of 68 statements. [2025-04-30 10:47:05,528 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:47:05,528 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-30 10:47:05,581 INFO L130 FreeRefinementEngine]: Strategy FOX found a feasible trace [2025-04-30 10:47:05,581 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-04-30 10:47:05,582 INFO L790 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (17 of 18 remaining) [2025-04-30 10:47:05,584 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE (16 of 18 remaining) [2025-04-30 10:47:05,584 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE (15 of 18 remaining) [2025-04-30 10:47:05,584 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (14 of 18 remaining) [2025-04-30 10:47:05,584 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (13 of 18 remaining) [2025-04-30 10:47:05,584 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 18 remaining) [2025-04-30 10:47:05,584 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 18 remaining) [2025-04-30 10:47:05,585 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 18 remaining) [2025-04-30 10:47:05,585 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 18 remaining) [2025-04-30 10:47:05,585 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (8 of 18 remaining) [2025-04-30 10:47:05,585 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 18 remaining) [2025-04-30 10:47:05,585 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 18 remaining) [2025-04-30 10:47:05,585 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE (5 of 18 remaining) [2025-04-30 10:47:05,585 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE (4 of 18 remaining) [2025-04-30 10:47:05,585 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (3 of 18 remaining) [2025-04-30 10:47:05,585 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (2 of 18 remaining) [2025-04-30 10:47:05,586 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 18 remaining) [2025-04-30 10:47:05,586 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 18 remaining) [2025-04-30 10:47:05,602 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-04-30 10:47:05,790 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:47:05,790 INFO L422 BasicCegarLoop]: Path program histogram: [7, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:47:05,853 INFO L242 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-04-30 10:47:05,853 INFO L171 ceAbstractionStarter]: Computing trace abstraction results [2025-04-30 10:47:05,858 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.04 10:47:05 BasicIcfg [2025-04-30 10:47:05,858 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-04-30 10:47:05,859 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-04-30 10:47:05,859 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-04-30 10:47:05,859 INFO L274 PluginConnector]: Witness Printer initialized [2025-04-30 10:47:05,859 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.04 10:46:32" (3/4) ... [2025-04-30 10:47:05,861 INFO L149 WitnessPrinter]: No result that supports witness generation found [2025-04-30 10:47:05,861 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-04-30 10:47:05,862 INFO L158 Benchmark]: Toolchain (without parser) took 33948.11ms. Allocated memory was 117.4MB in the beginning and 218.1MB in the end (delta: 100.7MB). Free memory was 90.6MB in the beginning and 168.2MB in the end (delta: -77.6MB). Peak memory consumption was 28.1MB. Max. memory is 16.1GB. [2025-04-30 10:47:05,862 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 83.9MB. Free memory is still 62.1MB. There was no memory consumed. Max. memory is 16.1GB. [2025-04-30 10:47:05,862 INFO L158 Benchmark]: CACSL2BoogieTranslator took 460.56ms. Allocated memory is still 117.4MB. Free memory was 90.4MB in the beginning and 54.6MB in the end (delta: 35.8MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. [2025-04-30 10:47:05,863 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.44ms. Allocated memory is still 117.4MB. Free memory was 54.4MB in the beginning and 51.6MB in the end (delta: 2.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-04-30 10:47:05,863 INFO L158 Benchmark]: Boogie Preprocessor took 60.14ms. Allocated memory is still 117.4MB. Free memory was 51.6MB in the beginning and 49.3MB in the end (delta: 2.3MB). There was no memory consumed. Max. memory is 16.1GB. [2025-04-30 10:47:05,863 INFO L158 Benchmark]: RCFGBuilder took 525.04ms. Allocated memory is still 117.4MB. Free memory was 49.3MB in the beginning and 68.6MB in the end (delta: -19.3MB). Peak memory consumption was 14.2MB. Max. memory is 16.1GB. [2025-04-30 10:47:05,863 INFO L158 Benchmark]: TraceAbstraction took 32858.96ms. Allocated memory was 117.4MB in the beginning and 218.1MB in the end (delta: 100.7MB). Free memory was 67.9MB in the beginning and 168.2MB in the end (delta: -100.4MB). Peak memory consumption was 106.5MB. Max. memory is 16.1GB. [2025-04-30 10:47:05,864 INFO L158 Benchmark]: Witness Printer took 2.55ms. Allocated memory is still 218.1MB. Free memory was 168.2MB in the beginning and 168.2MB in the end (delta: 19.6kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-04-30 10:47:05,864 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 83.9MB. Free memory is still 62.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 460.56ms. Allocated memory is still 117.4MB. Free memory was 90.4MB in the beginning and 54.6MB in the end (delta: 35.8MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 35.44ms. Allocated memory is still 117.4MB. Free memory was 54.4MB in the beginning and 51.6MB in the end (delta: 2.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 60.14ms. Allocated memory is still 117.4MB. Free memory was 51.6MB in the beginning and 49.3MB in the end (delta: 2.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 525.04ms. Allocated memory is still 117.4MB. Free memory was 49.3MB in the beginning and 68.6MB in the end (delta: -19.3MB). Peak memory consumption was 14.2MB. Max. memory is 16.1GB. * TraceAbstraction took 32858.96ms. Allocated memory was 117.4MB in the beginning and 218.1MB in the end (delta: 100.7MB). Free memory was 67.9MB in the beginning and 168.2MB in the end (delta: -100.4MB). Peak memory consumption was 106.5MB. Max. memory is 16.1GB. * Witness Printer took 2.55ms. Allocated memory is still 218.1MB. Free memory was 168.2MB in the beginning and 168.2MB in the end (delta: 19.6kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 1119]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 1119. Possible FailurePath: [L1108] 0 char *v; [L1121] 0 pthread_t t1, t2; [L1122] FCALL, FORK 0 pthread_create(&t1, 0, thread1, 0) VAL [\at(arg, Pre)={0:0}, t1=67108863, v={0:0}] [L1111] 1 v = malloc(sizeof(char) * 8) [L1112] 1 return 0; [L1123] FCALL, JOIN 1 pthread_join(t1, 0) VAL [\at(arg, Pre)={0:0}, \result={0:0}, arg={0:0}, t1=67108863, v={536870912:0}] [L1124] FCALL, FORK 0 pthread_create(&t2, 0, thread2, 0) VAL [\at(arg, Pre)={0:0}, \result={0:0}, arg={0:0}, t1=67108863, t2=67108864, v={536870912:0}] [L1116] COND TRUE 2 \read(*v) [L1116] FCALL 2 strcpy(v, "Bigshot") [L1117] 2 return 0; [L1125] FCALL, JOIN 2 pthread_join(t2, 0) VAL [\at(arg, Pre)={0:0}, \result={0:0}, arg={0:0}, t1=67108863, t2=67108864, v={536870912:0}] [L1126] EXPR 0 !v || v[0] == 'B' VAL [\at(arg, Pre)={0:0}, \result={0:0}, arg={0:0}, t1=67108863, t2=67108864, v={536870912:0}] [L1126] EXPR 0 !v || v[0] == 'B' VAL [\at(arg, Pre)={0:0}, \result={0:0}, arg={0:0}, v={536870912:0}] [L1126] EXPR 0 v[0] [L1126] EXPR 0 !v || v[0] == 'B' VAL [\at(arg, Pre)={0:0}, \result={0:0}, arg={0:0}, t1=67108863, t2=67108864, v={536870912:0}] [L1126] CALL 0 __VERIFIER_assert(!v || v[0] == 'B') [L1107] COND FALSE 0 !(!expression) VAL [\at(arg, Pre)={0:0}, \at(expression, Pre)=1, \result={0:0}, arg={0:0}, expression=1, v={536870912:0}] [L1126] RET 0 __VERIFIER_assert(!v || v[0] == 'B') [L1127] 0 return 0; VAL [\at(arg, Pre)={0:0}, \result=0, \result={0:0}, arg={0:0}, t1=67108863, t2=67108864, v={536870912:0}] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 20]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1122]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 1124]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 63 locations, 71 edges, 18 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 32.7s, OverallIterations: 19, TraceHistogramMax: 9, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.0s, AutomataDifference: 17.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3138 SdHoareTripleChecker+Valid, 11.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2791 mSDsluCounter, 2772 SdHoareTripleChecker+Invalid, 10.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2743 mSDsCounter, 97 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 10422 IncrementalHoareTripleChecker+Invalid, 10519 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 97 mSolverCounterUnsat, 29 mSDtfsCounter, 10422 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1113 GetRequests, 813 SyntacticMatches, 3 SemanticMatches, 297 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1846 ImplicationChecksByTransitivity, 7.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=674occurred in iteration=18, InterpolantAutomatonStates: 194, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 8.9s InterpolantComputationTime, 632 NumberOfCodeBlocks, 566 NumberOfCodeBlocksAsserted, 37 NumberOfCheckSat, 984 ConstructedInterpolants, 107 QuantifiedInterpolants, 16149 SizeOfPredicates, 91 NumberOfNonLiveVariables, 1899 ConjunctsInSsa, 188 ConjunctsInUnsatCore, 29 InterpolantComputations, 7 PerfectInterpolantSequences, 396/1244 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2025-04-30 10:47:05,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample